usfdУльтразвуковая и функциональная диагностикаUltrasound & Functional Diagnostics1607-07712408-9494Vidar Ltd.usfd-396Research ArticleУльтразвуковая диагностика в акушерстве и гинекологииObstetrics and Gynecology UltrasoundПрактические рекомендации ISUOG: проведение ультразвукового исследования плода в первом триместре беременности. Международное общество ультразвуковой диагностики в акушерстве и гинекологии (ISUOG)ISUOG Practice Guidelines: performance of first-trimester fetal ultrasound scanSalomonL. J.SalomonL. J.AlfirevicZ.AlfirevicZ.BilardoC. M.BilardoC. M.ChalouhiG. E.ChalouhiG. E.GhiT.GhiT.KaganK. O.KaganK. O.LauT. K.LauT. K.PapageorghiouA. T.PapageorghiouA. T.RaineFenningN. J.RaineFenningN. J.StirnemannJ.StirnemannJ.SureshS.SureshS.TaborA.TaborA.TimorTritschI. E.TimorTritschI. E.ToiA.ToiA.YeoG.YeoG.Paris Descartes University; Assistance PubliqueHopitaux de Paris; Hopital Necker EnfantsФранцияHopital Necker EnfantsFranceUniversity of LiverpoolUnited KingdomUniversity Medical Centre GroningenНидерландыUniversity Medical Centre GroningenNetherlandsHopital Necker EnfantsФранцияHopital Necker EnfantsFranceUniversity of BolognaИталияUniversity of BolognaItalyUniversity of TuebingenГерманияUniversity of TuebingenGermanyParamount Clinic, CentralГонконгUniversity of LondonВеликобританияUniversity of LondonUnited KingdomUniversity of NottinghamВеликобританияUniversity of NottinghamUnited KingdomUniversity Paris DescartesФранцияUniversity Paris Descartes,FranceMediscan Systems & Fetal Care Research Foundation, MylaporeИндияMediscan Systems & Fetal Care Research Foundation, MylaporeIndiaCopenhagen University HospitalДанияCopenhagen University HospitalDenmarkNew York University School of MedicineСоединённые Штаты АмерикиNew York University School of MedicineUnited StatesUniversity of TorontoКанадаUniversity of TorontoCanadaKK Women’s and Children’s HospitalСингапурKK Women’s and Children’s HospitalSingapore201525032026023755Copyright © Salomon L.J., Alfirevic Z., Bilardo C.M., Chalouhi G.E., Ghi T., Kagan K.O., Lau T.K., Papageorghiou A.T., RaineFenning N.J., Stirnemann J., Suresh S., Tabor A., TimorTritsch I.E., Toi A., Yeo G., 20262026Salomon L.J., Alfirevic Z., Bilardo C.M., Chalouhi G.E., Ghi T., Kagan K.O., Lau T.K., Papageorghiou A.T., RaineFenning N.J., Stirnemann J., Suresh S., Tabor A., TimorTritsch I.E., Toi A., Yeo G.Salomon L.J., Alfirevic Z., Bilardo C.M., Chalouhi G.E., Ghi T., Kagan K.O., Lau T.K., Papageorghiou A.T., RaineFenning N.J., Stirnemann J., Suresh S., Tabor A., TimorTritsch I.E., Toi A., Yeo G.This work is licensed under a Creative Commons Attribution 4.0 License.https://usfd.vidar.ru/jour/article/view/396

дан­ное ру­ко­вод­ст­во яв­ля­ет­ся пе­ре­во­дом ори­ги­наль­ной вер­сии, опуб­ли­ко­ван­ной ISUOG. Пе­ре­вод был вы­пол­нен экс­пер­та­ми в этой об­ла­с­ти и от­ре­дак­ти­ро­ван не­за­ви­си­мы­ми ре­цен­зен­та­ми, вла­де­ю­щи­ми со­от­вет­ст­ву­ю­щим язы­ком. Не­смо­т­ря на то что сде­ла­но все воз­мож­ное, что­бы не до­пу­с­тить ис­ка­же­ния ос­нов­но­го смыс­ла, про­цесс пе­ре­во­да мог при­ве­с­ти к не­боль­шим ва­ри­а­ци­ям смыс­ло­вых от­тен­ков при ис­поль­зо­ва­нии не­ко­то­рых слов или тер­ми­нов. Та­ким об­ра­зом, ISUOG под­чер­ки­ва­ет, что пе­ре­ве­ден­ное ру­ко­вод­ст­во не мо­жет рас­сма­т­ри­вать­ся как аб­со­лют­но точ­ная ко­пия ори­ги­на­ла, и не не­сет от­вет­ст­вен­но­с­ти за ка­кие-ли­бо не­со­от­вет­ст­вия, по­сколь­ку текст ру­ко­вод­ст­ва про­шел про­це­ду­ру офи­ци­аль­но­го одо­б­ре­ния ISUOG толь­ко в его ори­ги­наль­ной пе­чат­ной вер­сии на ан­г­лий­ском язы­ке.

Оригинальный текст руководства “ISUOG Practice Guidelines: performance of first-trimester fetal ultrasound scan” опубликован в журнале “Ultrasound in Obstetrics & Gynecology” (2013; 41: 102–113) и на сайте: http://www.isuog.org

These guidelines may have been translated, from the originals published by ISUOG, by recognized experts in the field and have been independently verified by reviewers with a relevant first language. Although all reasonable endeavors have been made to ensure that no fundamental meaning has been changed the process of trans-lation may naturally result in small variations in words or terminology and so ISUOG makes no claim that trans-lated guidelines can be considered to be an exact copy of the original and accepts no liability for the consequence of any variations. The CSC's guidelines are only officially approved by the ISUOG in their English published form.

беременностьпервый триместрультразвуковое исследованиеfirst-trimesterfetalultrasound scanReferencesSalomon L.J., Alfirevic Z., Berghella V., Bilardo C., Hernandez-Andrade E., Johnsen S.L., Kalache K., Leung K.Y., Malinger G., Munoz H., Prefumo F., Toi A., Lee W; ISUOG Clinical Standards Committee. Practice guidelines for performance of the routine mid-trimester fetal ultrasound scan. Ultrasound Obstet Gynecol 2011; 37: 116-126.Salomon L.J., Alfirevic Z., Berghella V., Bilardo C., Hernandez-Andrade E., Johnsen S.L., Kalache K., Leung K.Y., Malinger G., Munoz H., Prefumo F., Toi A., Lee W; ISUOG Clinical Standards Committee. Practice guidelines for performance of the routine mid-trimester fetal ultrasound scan. Ultrasound Obstet Gynecol 2011; 37: 116-126.Deter R.L., Buster J.E., Casson P.R., Carson S.A. Individual growth patterns in the first trimester: evidence for difference in embryonic and fetal growth rates. Ultrasound Obstet Gynecol 1999; 13: 90-98.Deter R.L., Buster J.E., Casson P.R., Carson S.A. Individual growth patterns in the first trimester: evidence for difference in embryonic and fetal growth rates. Ultrasound Obstet Gynecol 1999; 13: 90-98.Blaas H.G. The examination of the embryo and early fetus: how and by whom? Ultrasound Obstet Gynecol 1999;14:153-158.Blaas H.G. The examination of the embryo and early fetus: how and by whom? Ultrasound Obstet Gynecol 1999;14:153-158.Whitworth M., Bricker L., Neilson J.P., Dowswell T. Ultrasound for fetal assessment in early pregnancy. Cochrane Database Syst Rev 2010; 4: CD007058.Whitworth M., Bricker L., Neilson J.P., Dowswell T. Ultrasound for fetal assessment in early pregnancy. Cochrane Database Syst Rev 2010; 4: CD007058.Bennett K.A., Crane J.M.G., O’Shea P., Lacelle J., Hutchens D., Copel J.A. First trimester ultrasound screening is effective in reducing postterm labor induction rates: a randomized controlled trial. Am J Obstet Gynecol 2004; 190: 1077-1081.Bennett K.A., Crane J.M.G., O’Shea P., Lacelle J., Hutchens D., Copel J.A. First trimester ultrasound screening is effective in reducing postterm labor induction rates: a randomized controlled trial. Am J Obstet Gynecol 2004; 190: 1077-1081.Hoffman C.S., Messer L.C., Mendola P., Savitz D.A., Herring A.H., Hartmann K.E. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatr Perinat Epidemiol 2008; 22: 587-596.Hoffman C.S., Messer L.C., Mendola P., Savitz D.A., Herring A.H., Hartmann K.E. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatr Perinat Epidemiol 2008; 22: 587-596.Taipale P., Hiilesmaa V. Predicting delivery date by ultrasound and last menstrual period in early gestation. Obstet Gynecol 2001; 97: 189-194.Taipale P., Hiilesmaa V. Predicting delivery date by ultrasound and last menstrual period in early gestation. Obstet Gynecol 2001; 97: 189-194.Skalkidou A., Kieler H., Stephansson O., Roos N., Cnattingius S., Haglund B. Ultrasound pregnancy dating leads to biased perinatal morbidity and neonatal mortality among post-term-born girls. Epidemiology 2010; 21: 791-796.Skalkidou A., Kieler H., Stephansson O., Roos N., Cnattingius S., Haglund B. Ultrasound pregnancy dating leads to biased perinatal morbidity and neonatal mortality among post-term-born girls. Epidemiology 2010; 21: 791-796.Harrington D.J., MacKenzie I.Z., Thompson K., Fleminger M., Greenwood C. Does a first trimester dating scan using crown rump length measurement reduce the rate of induction of labor for prolonged pregnancy? An uncompleted randomized controlled trial of 463 women. BJOG 2006; 113: 171-176.Harrington D.J., MacKenzie I.Z., Thompson K., Fleminger M., Greenwood C. Does a first trimester dating scan using crown rump length measurement reduce the rate of induction of labor for prolonged pregnancy? An uncompleted randomized controlled trial of 463 women. BJOG 2006; 113: 171-176.Ott W.J. Accurate gestational dating: revisited. Am J Perinatol 1994; 11: 404-408.Ott W.J. Accurate gestational dating: revisited. Am J Perinatol 1994; 11: 404-408.Wisser J., Dirschedl P., Krone S. Estimation of gestational age by transvaginal sonographic measurement of greatest embryonic length in dated human embryos. Ultrasound Obstet Gynecol 1994; 4: 457-462.Wisser J., Dirschedl P., Krone S. Estimation of gestational age by transvaginal sonographic measurement of greatest embryonic length in dated human embryos. Ultrasound Obstet Gynecol 1994; 4: 457-462.Tunon K., Eik-Nes S.H., Grottum P., Von During V., Kahn J.A. Gestational age in pregnancies conceived after in vitro fertilization: a comparison between age assessed from oocyte retrieval, crown-rump length and biparietal diameter. Ultrasound Obstet Gynecol 2000; 15: 41-46.Tunon K., Eik-Nes S.H., Grottum P., Von During V., Kahn J.A. Gestational age in pregnancies conceived after in vitro fertilization: a comparison between age assessed from oocyte retrieval, crown-rump length and biparietal diameter. Ultrasound Obstet Gynecol 2000; 15: 41-46.Grange G., Pannier E., Goffinet F., Cabrol D., Zorn J.R. Dating biometry during the first trimester: accuracy of an every-day practice. Eur J Obstet Gynecol Reprod Biol 2000; 88: 61-64.Grange G., Pannier E., Goffinet F., Cabrol D., Zorn J.R. Dating biometry during the first trimester: accuracy of an every-day practice. Eur J Obstet Gynecol Reprod Biol 2000; 88: 61-64.Chalouhi G.E., Bernard J.P., Benoist G., Nasr B., Ville Y., Salomon L.J. A comparison of first trimester measurements for prediction of delivery date. J Matern Fetal Neonatal Med 2011; 24: 51-57.Chalouhi G.E., Bernard J.P., Benoist G., Nasr B., Ville Y., Salomon L.J. A comparison of first trimester measurements for prediction of delivery date. J Matern Fetal Neonatal Med 2011; 24: 51-57.Salomon L.J., Pizzi C., Gasparrini A., Bernard J.-P., Ville Y. Prediction of the date of delivery based on first trimester ultrasound measurements: an independent method from estimated date of conception. J Matern Fetal Neonatal Med 2010; 23: 1-9.Salomon L.J., Pizzi C., Gasparrini A., Bernard J.-P., Ville Y. Prediction of the date of delivery based on first trimester ultrasound measurements: an independent method from estimated date of conception. J Matern Fetal Neonatal Med 2010; 23: 1-9.Caughey A.B., Nicholson J.M., Washington A.E. First vs second trimester ultrasound: the effect on pregnancy dating and perinatal outcomes. Am J Obstet Gynecol 2008; 198: 703.e1-6.Caughey A.B., Nicholson J.M., Washington A.E. First vs second trimester ultrasound: the effect on pregnancy dating and perinatal outcomes. Am J Obstet Gynecol 2008; 198: 703.e1-6.Thorsell M., Kaijser M., Almstrom H., Andolf E. Expected day of delivery from ultrasound dating versus last menstrual period - obstetric outcome when dates mismatch. BJOG 2008; 115: 585-589.Thorsell M., Kaijser M., Almstrom H., Andolf E. Expected day of delivery from ultrasound dating versus last menstrual period - obstetric outcome when dates mismatch. BJOG 2008; 115: 585-589.Bottomley C., Bourne T. Dating and growth in the first trimester. Best Pract Res Clin Obstet Gynaecol 2009; 4: 439-452.Bottomley C., Bourne T. Dating and growth in the first trimester. Best Pract Res Clin Obstet Gynaecol 2009; 4: 439-452.Sonek J. First trimester ultrasonography in screening and detection of fetal anomalies. Am J Med Genet C Semin Med Genet 2007; 145: 45-61.Sonek J. First trimester ultrasonography in screening and detection of fetal anomalies. Am J Med Genet C Semin Med Genet 2007; 145: 45-61.Snijders R.J., Johnson S., Sebire N.J., Noble P.L., Nicolaides K.H. First-trimester ultrasound screening for chromosomal defects. Ultrasound Obstet Gynecol 1996; 7: 216-226.Snijders R.J., Johnson S., Sebire N.J., Noble P.L., Nicolaides K.H. First-trimester ultrasound screening for chromosomal defects. Ultrasound Obstet Gynecol 1996; 7: 216-226.Ville Y. ‘Ceci n’est pas une echographie’: a plea for quality assessment in prenatal ultrasound. Ultrasound Obstet Gynecol 2008; 31: 1-5.Ville Y. ‘Ceci n’est pas une echographie’: a plea for quality assessment in prenatal ultrasound. Ultrasound Obstet Gynecol 2008; 31: 1-5.Abramowicz J.S., Kossoff G., Marsal K., Ter Haar G. Safety Statement, 2000 (reconfirmed 2003). International Society of Ultrasound in Obstetrics and Gynecology (ISUOG). Ultrasound Obstet Gynecol 2003; 21: 100.Abramowicz J.S., Kossoff G., Marsal K., Ter Haar G. Safety Statement, 2000 (reconfirmed 2003). International Society of Ultrasound in Obstetrics and Gynecology (ISUOG). Ultrasound Obstet Gynecol 2003; 21: 100.Torloni M.R., Vedmedovska N., Merialdi M., Betran A.P., Allen T., Gonzalez R., Platt LD; ISUOG-WHO Fetal Growth Study Group. Safety of ultrasonography in pregnancy: WHO systematic review of the literature and meta-analysis. Ultrasound Obstet Gynecol 2009; 33: 599-608.Torloni M.R., Vedmedovska N., Merialdi M., Betran A.P., Allen T., Gonzalez R., Platt LD; ISUOG-WHO Fetal Growth Study Group. Safety of ultrasonography in pregnancy: WHO systematic review of the literature and meta-analysis. Ultrasound Obstet Gynecol 2009; 33: 599-608.Hershkovitz R., Sheiner E., Mazor M. Ultrasound in obstetrics: a review of safety. Eur J Obstet Gynecol Reprod Biol 2002; 101: 15-18.Hershkovitz R., Sheiner E., Mazor M. Ultrasound in obstetrics: a review of safety. Eur J Obstet Gynecol Reprod Biol 2002; 101: 15-18.Salvesen K., Lees C., Abramowicz J., Brezinka C., Ter Haar G., Marsal K. ISUOG statement on the safe use of Doppler in the 11 to 13+6-week fetal ultrasound examination. Ultrasound Obstet Gynecol 2011; 37: 628.Salvesen K., Lees C., Abramowicz J., Brezinka C., Ter Haar G., Marsal K. ISUOG statement on the safe use of Doppler in the 11 to 13+6-week fetal ultrasound examination. Ultrasound Obstet Gynecol 2011; 37: 628.Lewi L., Jani J., Blickstein I., Huber A., Gucciardo L., Van Mieghem T., Done E., Boes A.S., Hecher K., Gratacos E., Lewi P., Deprest J. The outcome of monochorionic diamniotic twin gestations in the era of invasive fetal therapy: a prospective cohort study. Am J Obstet Gynecol 2008; 199: 493.e1-7.Lewi L., Jani J., Blickstein I., Huber A., Gucciardo L., Van Mieghem T., Done E., Boes A.S., Hecher K., Gratacos E., Lewi P., Deprest J. The outcome of monochorionic diamniotic twin gestations in the era of invasive fetal therapy: a prospective cohort study. Am J Obstet Gynecol 2008; 199: 493.e1-7.Dias T., Arcangeli T., Bhide A., Napolitano R., Mahsud-Dornan S., Thilaganathan B. First-trimester ultrasound determination of chorionicity in twin pregnancy. Ultrasound Obstet Gynecol 2011; 38: 530-532.Dias T., Arcangeli T., Bhide A., Napolitano R., Mahsud-Dornan S., Thilaganathan B. First-trimester ultrasound determination of chorionicity in twin pregnancy. Ultrasound Obstet Gynecol 2011; 38: 530-532.Fong K.W., Toi A., Salem S., Hornberger L.K., Chitayat D., Keating S.J., McAuliffe F., Johnson J.A. Detection of fetal structural abnormalities with US during early pregnancy. Radiographics 2004; 24: 157-174.Fong K.W., Toi A., Salem S., Hornberger L.K., Chitayat D., Keating S.J., McAuliffe F., Johnson J.A. Detection of fetal structural abnormalities with US during early pregnancy. Radiographics 2004; 24: 157-174.Jurkovic D., Gruboeck K., Campbell S. Ultrasound features of normal early pregnancy development. Curr Opin Obstet Gynecol 1995; 7: 493-504.Jurkovic D., Gruboeck K., Campbell S. Ultrasound features of normal early pregnancy development. Curr Opin Obstet Gynecol 1995; 7: 493-504.Tezuka N., Sato S., Kanasugi H., Hiroi M. Embryonic heart rates: development in early first trimester and clinical evaluation. Gynecol Obstet Invest 1991; 32:210-212.Tezuka N., Sato S., Kanasugi H., Hiroi M. Embryonic heart rates: development in early first trimester and clinical evaluation. Gynecol Obstet Invest 1991; 32:210-212.Levi C.S., Lyons E.A., Zheng X.H., Lindsay D.J., Holt S.C. Endovaginal US: demonstration of cardiac activity in embryos of less than 5.0 mm in crown-rump length. Radiology 1990; 176: 71-74.Levi C.S., Lyons E.A., Zheng X.H., Lindsay D.J., Holt S.C. Endovaginal US: demonstration of cardiac activity in embryos of less than 5.0 mm in crown-rump length. Radiology 1990; 176: 71-74.Goldstein Sr. Significance of cardiac activity on endovaginal ultrasound in very early embryos. Obstet Gynecol 1992; 80: 670-672.Goldstein Sr. Significance of cardiac activity on endovaginal ultrasound in very early embryos. Obstet Gynecol 1992; 80: 670-672.Brown D.L., Emerson D.S., Felker R.E., Cartier M.S., Smith W.C. Diagnosis of early embryonic demise by endovaginal sonography. J Ultrasound Med 1990; 9: 631-636.Brown D.L., Emerson D.S., Felker R.E., Cartier M.S., Smith W.C. Diagnosis of early embryonic demise by endovaginal sonography. J Ultrasound Med 1990; 9: 631-636.Oh J.S., Wright G., Coulam C.B. Gestational sac diameter in very early pregnancy as a predictor of fetal outcome. Ultrasound Obstet Gynecol 2002; 20: 267-269.Oh J.S., Wright G., Coulam C.B. Gestational sac diameter in very early pregnancy as a predictor of fetal outcome. Ultrasound Obstet Gynecol 2002; 20: 267-269.Robinson H.P., Sweet E.M., Adam A.H. The accuracy of radiological estimates of gestational age using early fetal crown-rump length measurements by ultrasound as a basis for comparison. Br J Obstet Gynaecol 1979; 86: 525-528.Robinson H.P., Sweet E.M., Adam A.H. The accuracy of radiological estimates of gestational age using early fetal crown-rump length measurements by ultrasound as a basis for comparison. Br J Obstet Gynaecol 1979; 86: 525-528.Robinson H.P.. ‘‘Gestation sac’’ volumes as determined by sonar in the first trimester of pregnancy. Br J Obstet Gynaecol 1975; 82: 100-107.Robinson H.P.. ‘‘Gestation sac’’ volumes as determined by sonar in the first trimester of pregnancy. Br J Obstet Gynaecol 1975; 82: 100-107.Salomon L.J., Bernard M., Amarsy R., Bernard J.P., Ville Y. The impact of crown-rump length measurement error on combined Down syndrome screening: a simulation study. Ultrasound Obstet Gynecol 2009; 33: 506-511.Salomon L.J., Bernard M., Amarsy R., Bernard J.P., Ville Y. The impact of crown-rump length measurement error on combined Down syndrome screening: a simulation study. Ultrasound Obstet Gynecol 2009; 33: 506-511.Sladkevicius P., Saltvedt S., Almstrom H., Kublickas M., Grunewald C., Valentin L. Ultrasound dating at 12-14 weeks of gestation. A prospective cross-validation of established dating formulae in in-vitro fertilized pregnancies. Ultrasound Obstet Gynecol 2005; 26: 504-511.Sladkevicius P., Saltvedt S., Almstrom H., Kublickas M., Grunewald C., Valentin L. Ultrasound dating at 12-14 weeks of gestation. A prospective cross-validation of established dating formulae in in-vitro fertilized pregnancies. Ultrasound Obstet Gynecol 2005; 26: 504-511.Altman D.G., Chitty L.S. New charts for ultrasound dating of pregnancy. Ultrasound Obstet Gynecol 1997;10: 174-191.Altman D.G., Chitty L.S. New charts for ultrasound dating of pregnancy. Ultrasound Obstet Gynecol 1997;10: 174-191.Salomon L.J., Bernard J.P., Duyme M., Dorion A., Ville Y. Revisiting first-trimester fetal biometry. Ultrasound Obstet Gynecol 2003; 22: 63-66.Salomon L.J., Bernard J.P., Duyme M., Dorion A., Ville Y. Revisiting first-trimester fetal biometry. Ultrasound Obstet Gynecol 2003; 22: 63-66.Loughna P., Chitty L., Evans T., Chudleigh T. Fetal size and dating: charts recommended for clinical obstetric practice. Ultrasound 2009; 17: 161-167.Loughna P., Chitty L., Evans T., Chudleigh T. Fetal size and dating: charts recommended for clinical obstetric practice. Ultrasound 2009; 17: 161-167.Hadlock F.P., Deter R.L., Carpenter R.J., Park S.K. Estimating fetal age: effect of head shape on BPD. AJR Am J Roentgenol 1981; 137: 83-85.Hadlock F.P., Deter R.L., Carpenter R.J., Park S.K. Estimating fetal age: effect of head shape on BPD. AJR Am J Roentgenol 1981; 137: 83-85.Verburg B.O., Steegers E.A.P., De Ridder M., Snijders R.J.M., Smith E., Hofman A., Moll H.A., Jaddoe V.W., Witteman J.C. New charts for ultrasound dating of pregnancy and assessment of fetal growth: longitudinal data from a population-based cohort study. Ultrasound Obstet Gynecol 2008; 31: 388-396.Verburg B.O., Steegers E.A.P., De Ridder M., Snijders R.J.M., Smith E., Hofman A., Moll H.A., Jaddoe V.W., Witteman J.C. New charts for ultrasound dating of pregnancy and assessment of fetal growth: longitudinal data from a population-based cohort study. Ultrasound Obstet Gynecol 2008; 31: 388-396.Crowley P. Interventions for preventing or improving the outcome of delivery at or beyond term. Cochrane Database Syst Rev 2000; (2): CD000170.Crowley P. Interventions for preventing or improving the outcome of delivery at or beyond term. Cochrane Database Syst Rev 2000; (2): CD000170.Mongelli M., Wong Y.C., Venkat A., Chua T.M. Induction policy and missed post-term pregnancies: a mathematical model. Aust N Z J Obstet Gynaecol 2001; 41: 38-40.Mongelli M., Wong Y.C., Venkat A., Chua T.M. Induction policy and missed post-term pregnancies: a mathematical model. Aust N Z J Obstet Gynaecol 2001; 41: 38-40.Hoffman C.S., Messer L.C., Mendola P., Savitz D.A., Herring A.H., Hartmann K.E. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatr Perinat Epidemiol 2008; 22: 587-596.Hoffman C.S., Messer L.C., Mendola P., Savitz D.A., Herring A.H., Hartmann K.E. Comparison of gestational age at birth based on last menstrual period and ultrasound during the first trimester. Paediatr Perinat Epidemiol 2008; 22: 587-596.NICE. Antenatal care: Routine care for the healthy pregnant woman. National Institute for Health and Clinical Excellence: London, 2010.NICE. Antenatal care: Routine care for the healthy pregnant woman. National Institute for Health and Clinical Excellence: London, 2010.Savitz D.A., Terry J.W., Dole N., Thorp J.M., Siega-Riz A.M., Herring A.H. Comparison of pregnancy dating by last menstrual period, ultrasound scanning, and their combination. Am J Obstet Gynecol 2002; 187: 1660-1666.Savitz D.A., Terry J.W., Dole N., Thorp J.M., Siega-Riz A.M., Herring A.H. Comparison of pregnancy dating by last menstrual period, ultrasound scanning, and their combination. Am J Obstet Gynecol 2002; 187: 1660-1666.Bagratee J.S., Regan L., Khullar V., Connolly C., Moodley J. Reference intervals of gestational sac, yolk sac and embryo volumes using three-dimensional ultrasound. Ultrasound Obstet Gynecol 2009; 34: 503-509.Bagratee J.S., Regan L., Khullar V., Connolly C., Moodley J. Reference intervals of gestational sac, yolk sac and embryo volumes using three-dimensional ultrasound. Ultrasound Obstet Gynecol 2009; 34: 503-509.Grisolia G., Milano K., Pilu G., Banzi C., David C., Gabrielli S., Rizzo N., Morandi R., Bovicelli L. Biometry of early pregnancy with transvaginal sonography. Ultrasound Obstet Gynecol 1993; 3: 403-411.Grisolia G., Milano K., Pilu G., Banzi C., David C., Gabrielli S., Rizzo N., Morandi R., Bovicelli L. Biometry of early pregnancy with transvaginal sonography. Ultrasound Obstet Gynecol 1993; 3: 403-411.Robinson H.P.. Sonar measurement of fetal crown-rump length as means of assessing maturity in first trimester of pregnancy. Br Med J 1973; 4: 28-31.Robinson H.P.. Sonar measurement of fetal crown-rump length as means of assessing maturity in first trimester of pregnancy. Br Med J 1973; 4: 28-31.Robinson H.P., Fleming J.E. A critical evaluation of sonar ‘‘crown-rump length’’ measurements. Br J Obstet Gynaecol 1975; 82: 702-710.Robinson H.P., Fleming J.E. A critical evaluation of sonar ‘‘crown-rump length’’ measurements. Br J Obstet Gynaecol 1975; 82: 702-710.Dias T., Mahsud-Dornan S., Thilaganathan B., Papageorghiou A., Bhide A. First-trimester ultrasound dating of twin pregnancy: are singleton charts reliable? BJOG 2010; 117: 979-984.Dias T., Mahsud-Dornan S., Thilaganathan B., Papageorghiou A., Bhide A. First-trimester ultrasound dating of twin pregnancy: are singleton charts reliable? BJOG 2010; 117: 979-984.Saltvedt S., Almstrom H., Kublickas M., Valentin L., Grunewald C. Detection of malformations in chromosomally normal fetuses by routine ultrasound at 12 or 18 weeks of gestation - a randomized controlled trial in 39,572 pregnancies. BJOG 2006; 113: 664-674.Saltvedt S., Almstrom H., Kublickas M., Valentin L., Grunewald C. Detection of malformations in chromosomally normal fetuses by routine ultrasound at 12 or 18 weeks of gestation - a randomized controlled trial in 39,572 pregnancies. BJOG 2006; 113: 664-674.Chen M., Lee C.P., Lam Y.H., Tang R.Y.K., Chan B.C.P., Wong S.F., Tse L.H., Tang M.H. Comparison of nuchal and detailed morphology ultrasound examinations in early pregnancy for fetal structural abnormality screening: a randomized controlled trial. Ultrasound Obstet Gynecol 2008; 31: 136-146; discussion 146.Chen M., Lee C.P., Lam Y.H., Tang R.Y.K., Chan B.C.P., Wong S.F., Tse L.H., Tang M.H. Comparison of nuchal and detailed morphology ultrasound examinations in early pregnancy for fetal structural abnormality screening: a randomized controlled trial. Ultrasound Obstet Gynecol 2008; 31: 136-146; discussion 146.Timor-Tritsch I.E., Fuchs K.M., Monteagudo A., D’Alton M.E. Performing a fetal anatomy scan at the time of first-trimester screening. Obstet Gynecol 2009; 113: 402-407.Timor-Tritsch I.E., Fuchs K.M., Monteagudo A., D’Alton M.E. Performing a fetal anatomy scan at the time of first-trimester screening. Obstet Gynecol 2009; 113: 402-407.Abu-Rustum R.S., Daou L., Abu-Rustum S.E. Role of first trimester sonography in the diagnosis of aneuploidy and structural fetal anomalies. J Ultrasound Med 2010;29:1445-1452.Abu-Rustum R.S., Daou L., Abu-Rustum S.E. Role of first trimester sonography in the diagnosis of aneuploidy and structural fetal anomalies. J Ultrasound Med 2010;29:1445-1452.Timor-Tritsch I.E., Bashiri A., Monteagudo A., Arslan A.A. Qualified and trained sonographers in the US can perform early fetal anatomy scans between 11 and 14 weeks. Am J Obstet Gynecol 2004; 191: 1247-1252.Timor-Tritsch I.E., Bashiri A., Monteagudo A., Arslan A.A. Qualified and trained sonographers in the US can perform early fetal anatomy scans between 11 and 14 weeks. Am J Obstet Gynecol 2004; 191: 1247-1252.Bronshtein M., Zimmer E.Z. Transvaginal ultrasound diagnosis of fetal clubfeet at 13 weeks, menstrual age. J Clin Ultrasound. 1989; 17: 518-520.Bronshtein M., Zimmer E.Z. Transvaginal ultrasound diagnosis of fetal clubfeet at 13 weeks, menstrual age. J Clin Ultrasound. 1989; 17: 518-520.Taipale P., Ammala M., Salonen R., Hiilesmaa V. Learning curve in ultrasonographic screening for selected fetal structural anomalies in early pregnancy. Obstet Gynecol 2003; 101: 273-278.Taipale P., Ammala M., Salonen R., Hiilesmaa V. Learning curve in ultrasonographic screening for selected fetal structural anomalies in early pregnancy. Obstet Gynecol 2003; 101: 273-278.Cedergren M., Selbing A. Detection of fetal structural abnormalities by an 11-14-week ultrasound dating scan in an unselected Swedish population. Acta Obstet Gynecol Scand 2006; 85: 912-915.Cedergren M., Selbing A. Detection of fetal structural abnormalities by an 11-14-week ultrasound dating scan in an unselected Swedish population. Acta Obstet Gynecol Scand 2006; 85: 912-915.Fisher J. First-trimester screening: dealing with the fall-out. Prenat Diagn 2011; 31: 46-49.Fisher J. First-trimester screening: dealing with the fall-out. Prenat Diagn 2011; 31: 46-49.Chaoui R., Nicolaides K.H. From nuchal translucency to intracranial translucency: towards the early detection of spina bifida. Ultrasound Obstet Gynecol 2010; 35: 133-138.Chaoui R., Nicolaides K.H. From nuchal translucency to intracranial translucency: towards the early detection of spina bifida. Ultrasound Obstet Gynecol 2010; 35: 133-138.Sepulveda W., Wong A.E., Martinez-Ten P., Perez-Pedregosa J. Retronasal triangle: a sonographic landmark for the screening of cleft palate in the first trimester. Ultrasound Obstet Gynecol 2010; 35: 7-13.Sepulveda W., Wong A.E., Martinez-Ten P., Perez-Pedregosa J. Retronasal triangle: a sonographic landmark for the screening of cleft palate in the first trimester. Ultrasound Obstet Gynecol 2010; 35: 7-13.Syngelaki A., Chelemen T., Dagklis T., Allan L., Nicolaides K.H. Challenges in the diagnosis of fetal non-chromosomal abnormalities at 11-13 weeks. Prenat Diagn 2011; 31: 90-102.Syngelaki A., Chelemen T., Dagklis T., Allan L., Nicolaides K.H. Challenges in the diagnosis of fetal non-chromosomal abnormalities at 11-13 weeks. Prenat Diagn 2011; 31: 90-102.Bernard J.-P., Cuckle H.S., Stirnemann J.J., Salomon L.J., Ville Y. Screening for fetal spina bifida by ultrasound examination in the first trimester of pregnancy using fetal biparietal diameter. Am J Obstet Gynecol 2012; 207: 306.e1-5.Bernard J.-P., Cuckle H.S., Stirnemann J.J., Salomon L.J., Ville Y. Screening for fetal spina bifida by ultrasound examination in the first trimester of pregnancy using fetal biparietal diameter. Am J Obstet Gynecol 2012; 207: 306.e1-5.DeVore G.R. First-trimester fetal echocardiography: is the future now? Ultrasound Obstet Gynecol 2002; 20: 6-8.DeVore G.R. First-trimester fetal echocardiography: is the future now? Ultrasound Obstet Gynecol 2002; 20: 6-8.Yagel S., Cohen S.M., Messing B. First and early second trimester fetal heart screening. Curr Opin Obstet Gynecol 2007; 19: 183-190.Yagel S., Cohen S.M., Messing B. First and early second trimester fetal heart screening. Curr Opin Obstet Gynecol 2007; 19: 183-190.Van Zalen-Sprock R.M., Vugt J.M., van Geijn H.P. First-trimester sonography of physiological midgut herniation and early diagnosisof omphalocele. Prenat Diagn 1997; 17: 511-518.Van Zalen-Sprock R.M., Vugt J.M., van Geijn H.P. First-trimester sonography of physiological midgut herniation and early diagnosisof omphalocele. Prenat Diagn 1997; 17: 511-518.Bhaduri M., Fong K., Toi A., Tomlinson G., Okun N. Fetal anatomic survey using three-dimensional ultrasound in conjunction with first-trimester nuchal translucency screening. Prenat Diagn 2010; 30:267-273.Bhaduri M., Fong K., Toi A., Tomlinson G., Okun N. Fetal anatomic survey using three-dimensional ultrasound in conjunction with first-trimester nuchal translucency screening. Prenat Diagn 2010; 30:267-273.Nicolaides K.H., Azar G., Byrne D., Mansur C., Marks K. Fetal nuchal translucency: ultrasound screening for chromosomal defects in first trimester of pregnancy. BMJ 1992; 304: 867-869.Nicolaides K.H., Azar G., Byrne D., Mansur C., Marks K. Fetal nuchal translucency: ultrasound screening for chromosomal defects in first trimester of pregnancy. BMJ 1992; 304: 867-869.Nicolaides K.H., Snijders R.J., Gosden C.M., Berry C., Campbell S. Ultrasonographically detectable markers of fetal chromosomal abnormalities. Lancet 1992; 340: 704-707.Nicolaides K.H., Snijders R.J., Gosden C.M., Berry C., Campbell S. Ultrasonographically detectable markers of fetal chromosomal abnormalities. Lancet 1992; 340: 704-707.Kagan K.O., Wright D., Baker A., Sahota D., Nicolaides K.H. Screening for trisomy 21 by maternal age, fetal nuchal translucency thickness, free beta- human chorionic gonadotropin and pregnancy-associated plasma protein-A. Ultrasound Obstet Gynecol 2008; 31: 618-624.Kagan K.O., Wright D., Baker A., Sahota D., Nicolaides K.H. Screening for trisomy 21 by maternal age, fetal nuchal translucency thickness, free beta- human chorionic gonadotropin and pregnancy-associated plasma protein-A. Ultrasound Obstet Gynecol 2008; 31: 618-624.Kagan K.O., Cicero S., Staboulidou I., Wright D., Nicolaides K.H. Fetal nasal bone in screening for trisomies 21, 18 and 13 and Turner syndrome at 11-13 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 259-264.Kagan K.O., Cicero S., Staboulidou I., Wright D., Nicolaides K.H. Fetal nasal bone in screening for trisomies 21, 18 and 13 and Turner syndrome at 11-13 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 259-264.Kagan K.O., Valencia C., Livanos P., Wright D., Nicolaides K.H. Tricuspid regurgitation in screening for trisomies 21, 18 and 13 and Turner syndrome at 11+0 to 13+6 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 18-22.Kagan K.O., Valencia C., Livanos P., Wright D., Nicolaides K.H. Tricuspid regurgitation in screening for trisomies 21, 18 and 13 and Turner syndrome at 11+0 to 13+6 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 18-22.Maiz N., Valencia C., Kagan K.O., Wright D., Nicolaides K.H. Ductus venosus Doppler in screening for trisomies 21, 18 and 13 and Turner syndrome at 11-13 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 512-517.Maiz N., Valencia C., Kagan K.O., Wright D., Nicolaides K.H. Ductus venosus Doppler in screening for trisomies 21, 18 and 13 and Turner syndrome at 11-13 weeks of gestation. Ultrasound Obstet Gynecol 2009; 33: 512-517.Nicolaides K.H. Screening for fetal aneuploidies at 11 to 13 weeks. Prenat Diagn 2011; 31: 7-15.Nicolaides K.H. Screening for fetal aneuploidies at 11 to 13 weeks. Prenat Diagn 2011; 31: 7-15.Mustafa S.A., Brizot M.L., Carvalho M.H.B., Watanabe L., Kahhale S., Zugaib M. Transvaginal ultrasonography in predicting placenta previa at delivery: a longitudinal study. Ultrasound Obstet Gynecol 2002; 20: 356-359.Mustafa S.A., Brizot M.L., Carvalho M.H.B., Watanabe L., Kahhale S., Zugaib M. Transvaginal ultrasonography in predicting placenta previa at delivery: a longitudinal study. Ultrasound Obstet Gynecol 2002; 20: 356-359.Timor-Tritsch I.E., Monteagudo A., Santos R., Tsymbal T., Pineda G., Arslan A.A. The diagnosis, treatment, and follow-up of cesarean scar pregnancy. Am J Obstet Gynecol 2012; 207: 44.e1-13.Timor-Tritsch I.E., Monteagudo A., Santos R., Tsymbal T., Pineda G., Arslan A.A. The diagnosis, treatment, and follow-up of cesarean scar pregnancy. Am J Obstet Gynecol 2012; 207: 44.e1-13.Timor-Tritsch I.E., Monteagudo A. Unforeseen consequences of the increasing rate of cesarean deliveries: early placenta accreta and cesarean scar pregnancy. A review. Am J Obstet Gynecol 2012; 207: 14-29.Timor-Tritsch I.E., Monteagudo A. Unforeseen consequences of the increasing rate of cesarean deliveries: early placenta accreta and cesarean scar pregnancy. A review. Am J Obstet Gynecol 2012; 207: 14-29.Stirnemann J.J., Chalouhi G.E., Forner S., Saidji Y., Salomon L.J., Bernard J.-P., Ville Y. First-trimester uterine scar assessment by transvaginal ultrasound. Am J Obstet Gynecol 2011; 205: 551.e1-6.Stirnemann J.J., Chalouhi G.E., Forner S., Saidji Y., Salomon L.J., Bernard J.-P., Ville Y. First-trimester uterine scar assessment by transvaginal ultrasound. Am J Obstet Gynecol 2011; 205: 551.e1-6.Stirnemann J.J., Mousty E., Chalouhi G., Salomon L.J., Bernard J.-P., Ville Y. Screening for placenta accreta at 11-14 weeks of gestation. Am J Obstet Gynecol 2011; 205: 547. e1-6.Stirnemann J.J., Mousty E., Chalouhi G., Salomon L.J., Bernard J.-P., Ville Y. Screening for placenta accreta at 11-14 weeks of gestation. Am J Obstet Gynecol 2011; 205: 547. e1-6.Hadlock F.P., Shah Y.P., Kanon D.J., Lindsey J.V. Fetal crown-rump length: reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US. Radiology 1992; 182: 501-505.Hadlock F.P., Shah Y.P., Kanon D.J., Lindsey J.V. Fetal crown-rump length: reevaluation of relation to menstrual age (5-18 weeks) with high-resolution real-time US. Radiology 1992; 182: 501-505.Daya S. Accuracy of gestational age estimation by means of fetal crown-rump length measurement. Am J Obstet Gynecol 1993; 168: 903-908.Daya S. Accuracy of gestational age estimation by means of fetal crown-rump length measurement. Am J Obstet Gynecol 1993; 168: 903-908.McLennan A.C., Schluter P.J. Construction of modern Australian first trimester ultrasound dating and growth charts. J Med Imaging Radiat Oncol 2008;52:471-479.McLennan A.C., Schluter P.J. Construction of modern Australian first trimester ultrasound dating and growth charts. J Med Imaging Radiat Oncol 2008;52:471-479.Hadlock F.P., Deter R.L., Harrist R.B., Park S.K. Fetal biparietal diameter: a critical re-evaluation of the relation to menstrual age by means of real-time ultrasound. J Ultrasound Med 1982; 1: 97-104.Hadlock F.P., Deter R.L., Harrist R.B., Park S.K. Fetal biparietal diameter: a critical re-evaluation of the relation to menstrual age by means of real-time ultrasound. J Ultrasound Med 1982; 1: 97-104.McAuliffe F.M., Fong K.W., Toi A., Chitayat D., Keating S., Johnson J.-A. Ultrasound detection of fetal anomalies in conjunction with first-trimester nuchal translucency screening: a feasibility study. Am J Obstet Gynecol 2005; 193: 1260-1265.McAuliffe F.M., Fong K.W., Toi A., Chitayat D., Keating S., Johnson J.-A. Ultrasound detection of fetal anomalies in conjunction with first-trimester nuchal translucency screening: a feasibility study. Am J Obstet Gynecol 2005; 193: 1260-1265.Von Kaisenberg C.S., Kuhling-von Kaisenberg H., Fritzer E., Schemm S., Meinhold-Heerlein I., Jonat W. Fetal transabdominal anatomy scanning using standard views at 11 to 14 weeks’ gestation. Am J Obstet Gynecol 2005; 192: 535-542.Von Kaisenberg C.S., Kuhling-von Kaisenberg H., Fritzer E., Schemm S., Meinhold-Heerlein I., Jonat W. Fetal transabdominal anatomy scanning using standard views at 11 to 14 weeks’ gestation. Am J Obstet Gynecol 2005; 192: 535-542.

The authors declare that there are no conflicts of interest present.