Early first-trimester trophoblast volume in pregnancies that result in live birth or miscarriage: 3D trophoblast volume
Abstract
OBJECTIVES: To assess the validity of trophoblast volume measurements on three-dimensional ultrasound (3D-US) with Virtual Organ Computer-aided AnaLysis (VOCAL(TM) ), to create reference values between 6 and 12 weeks of gestation and to compare trophoblast volume between pregnancies ending in miscarriage and those resulting in live birth. METHODS: In a prospective periconceptional cohort, we performed weekly 3D-US in 112 singleton pregnancies resulting in a non-malformed live birth and in 56 ending in miscarriage. Scans were performed between 6 and 12 weeks. Trophoblast volumes were calculated by subtracting the gestational sac volume from the volume of the total pregnancy. The interobserver and intraobserver agreement of measurements were determined to assess validity. Reference values were created for trophoblast volume in relation to crown-rump length and gestational age. RESULTS: A total of 722 3D-US examinations were available for offline VOCAL measurements, but measurements could be performed in only 53% of these due to non-targeted scanning and incomplete framing. Interobserver and intraobserver agreement for trophoblast volume measurements were excellent, with intraclass correlation coefficients > 0.97. Trophoblast volumes of pregnancies ending in miscarriage were significantly smaller (P < 0.01) than were those of pregnancies that resulted in live birth. Trophoblast growth in pregnancies ending in miscarriage was also reduced compared with that in pregnancies that resulted in live birth. CONCLUSION: VOCAL is a valid technique for measuring trophoblast volume during the early first trimester of pregnancy. Pregnancies ending in miscarriage have smaller trophoblast volumes as well as reduced trophoblast growth compared with those that result in live birth.
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Some studies used 3D ultrasound to observe the volume of the gestational sac or trophoblast to predict early pregnancy miscarriage.
“Some studies used 3D ultrasound to observe the volume of the gestational sac or trophoblast to predict early pregnancy miscarriage [30–32].”
Cites
WinBUGS - A Bayesian modelling framework: Concepts, structure, and extensibility
Lunn, D. J., Thomas, A., Best, N., & Spiegelhalter, D. J. (2000) · Statistics and Computing · doi:10.1023/a:1008929526011 · Cited by 5,372 · see citing works
Jauniaux, E. R. M., Poston, L., & Burton, G. J. (2006) · Human Reproduction Update · doi:10.1093/humupd/dml016 · Cited by 608 · see citing works
Predictors of neonatal outcome in early-onset placental dysfunction
Baschat, A. A., Cosmi, E., Bilardo, C. M., Wolf, H., Berg, C., Rigano, S., Germer, U., Moyano, D., Turan, S., Hartung, J., et al. (2007) · Obstetrics & Gynecology · doi:10.1097/01.aog.0000253215.79121.75 · Cited by 485 · see citing works
Histological study of the materno-embryonic interface in spontaneous abortion
Hustin, J., Jauniaux, E. R. M., & Schaaps, J. P. (1990) · Placenta · doi:10.1016/s0143-4004(05)80193-6 · Cited by 299 · see citing works
Jauniaux, E. R. M., Gulbis, B., & Burton, G. J. (2003) · Placenta · doi:10.1053/plac.2002.0932 · Cited by 231 · see citing works
Raine‐Fenning, N., Clewes, J. S., Kendall, N. R., Bunkheila, A., Campbell, B. K., & Johnson, I. R. (2003) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.61 · Cited by 228 · see citing works
The role of ultrasound imaging in diagnosing and investigating early pregnancy failure
Jauniaux, E. R. M., Johns, J., & Burton, G. J. (2005) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.1892 · Cited by 186 · see citing works
Hafner, E., Metzenbauer, M., Höfinger, D., Münkel, M., Gassner, R., Schuchter, K., Dillinger‐Paller, B., & Philipp, K. (2003) · Placenta · doi:10.1053/plac.2002.0918 · Cited by 127 · see citing works
Jauniaux, E. R. M., Zaidi, J., Jurkovic, D., Campbell, S. C., & Hustin, J. (1994) · Human Reproduction · doi:10.1093/oxfordjournals.humrep.a138465 · Cited by 122 · see citing works
Jauniaux, E. R. M., Greenwold, N., Hempstock, J., & Burton, G. J. (2003) · Fertility and Sterility · doi:10.1016/s0015-0282(02)04568-5 · Cited by 116 · see citing works
Raine‐Fenning, N., Campbell, B. K., Clewes, J. S., & Johnson, I. R. (2003) · Ultrasound in Medicine & Biology · doi:10.1016/s0301-5629(03)01068-8 · Cited by 110 · see citing works
Falcón, O., Węgrzyn, P., Faro, C. B. D. A., Peralta, C. F. A., & Nicolaides, K. H. (2005) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.1898 · Cited by 109 · see citing works
Wegrzyn, P., Faro, C., Falcon, O., Peralta, C. F. A., & Nicolaides, K. H. (2005) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.1923 · Cited by 103 · see citing works
Schuchter, K., Metzenbauer, M., Hafner, E., & Philipp, K. (2001) · Ultrasound in Obstetrics and Gynecology · doi:10.1046/j.0960-7692.2001.00596.x · Cited by 95 · see citing works
Hafner, E., Philipp, T., Schuchter, K., Dillinger‐Paller, B., Philipp, K., & Bauer, P. (1998) · Ultrasound in Obstetrics and Gynecology · doi:10.1046/j.1469-0705.1998.12020097.x · Cited by 95 · see citing works
Rizzo, G., Capponi, A., Cavicchioni, O., Vendola, M., & Arduini, D. (2007) · European Journal of Obstetrics & Gynecology and Reproductive Biology · doi:10.1016/j.ejogrb.2007.08.015 · Cited by 91 · see citing works
Metzenbauer, M., Hafner, E., Schuchter, K., & Philipp, K. (2002) · Ultrasound in Obstetrics & Gynecology · doi:10.1046/j.1469-0705.2002.00655.x · Cited by 79 · see citing works
Human embryonic growth trajectories and associations with fetal growth and birthweight
van Uitert, E. M., Exalto, N., Burton, G. J., Willemsen, S. P., Koning, A. H. J., Eilers, P. H. C., Laven, J. S. E., Steegers, E. A. P., & Steegers‐Theunissen, R. P. M. (2013) · Human Reproduction · doi:10.1093/humrep/det115 · Cited by 79 · see citing works
Self-citationMerce, L. T., Barco, M. J., Alcázar, J. L., Sabatel, R., & Troyano, J. M. (2008) · American Journal of Obstetrics and Gynecology · doi:10.1016/j.ajog.2008.10.020 · Cited by 72 · see citing works
Reliability of three‐dimensional sonographic measurements in early pregnancy using virtual reality
Verwoerd-Dikkeboom, C. M., Koning, A. H. J., Hop, W. C. J., Rousian, M., van der Spek, P. J., Exalto, N., & Steegers, E. A. P. (2008) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.5390 · Cited by 66 · see citing works
Self-citationCorrelation of first trimester placental volume and second trimester uterine artery Doppler flow
Hafner, E., Metzenbauer, M., Dillinger-Paller, B., Hoefinger, D., Schuchter, K., Sommer-Wagner, H., & Philipp, K. (2001) · Placenta · doi:10.1053/plac.2001.0721 · Cited by 65 · see citing works
Burton, G. J., Scioscia, M., & Rademacher, T. W. (2011) · Journal of Reproductive Immunology · doi:10.1016/j.jri.2011.02.005 · Cited by 64 · see citing works
Early pregnancy volume measurements: validation of ultrasound techniques and new perspectives
Rousian, M., Verwoerd-Dikkeboom, C. M., Koning, A. H. J., Hop, W., van der Spek, P. J., Exalto, N., & Steegers, E. (2008) · BJOG An International Journal of Obstetrics & Gynaecology · doi:10.1111/j.1471-0528.2008.02006.x · Cited by 60 · see citing works
Self-citationCheong, K. B., Leung, K. Y., Li, T. K. T., Chan, H. Y., Lee, Y. P., & Tang, M. H. Y. (2010) · Ultrasound in Obstetrics & Gynecology · doi:10.1002/uog.7609 · Cited by 45 · see citing works
Comparison of Placental Volume in Early Pregnancy Using Multiplanar and VOCAL Methods
NOWAK, P. M., Nardozza, L. M. M., Júnior, E. A., Rôlo, L. C., & Moron, A. F. (2008) · Placenta · doi:10.1016/j.placenta.2007.12.003 · Cited by 43 · see citing works
Wolf, H., Oosting, H., & Treffers, P. E. (1989) · American Journal of Obstetrics and Gynecology · doi:10.1016/0002-9378(89)90651-0 · Cited by 38 · see citing works
Deurloo, K. L., Spreeuwenberg, M. D., Rekoert‐Hollander, M., & van Vugt, J. M. G. (2007) · Journal of Clinical Ultrasound · doi:10.1002/jcu.20306 · Cited by 33 · see citing works
Rousian, M., Hop, W. C. J., Koning, A. H. J., van der Spek, P. J., Exalto, N., & Steegers, E. A. P. (2013) · Human Reproduction · doi:10.1093/humrep/det035 · Cited by 31 · see citing works
Self-citationEvaluation of Placental Volume at 7–10 + 6 Weeks of Pregnancy by 3D-Sonography
Nardozza, L. M. M., NOWAK, P. M., Júnior, E. A., Filho, H. A. G., Rôlo, L. C., Torloni, M. R., & Moron, A. F. (2009) · Placenta · doi:10.1016/j.placenta.2009.04.008 · Cited by 28 · see citing works
Zusammenhänge zwischen Geburtsgewicht und Plazentavolumen im ersten Trimenon
Metzenbauer, M., Hafner, E., Höfinger, D., Schuchter, K., & Philipp, K. (2002) · Zeitschrift für Geburtshilfe und Neonatologie · doi:10.1055/s-2002-33671 · Cited by 17 · see citing works
Rousian, M., Groenenberg, I. A. L., Hop, W. C. J., Koning, A. H. J., van der Spek, P. J., Exalto, N., & Steegers, E. A. P. (2013) · Reproductive Sciences · doi:10.1177/1933719112468950 · Cited by 15 · see citing works
Self-citation
Flagged first, then by citations
Cited by
Sorted by citations
Burton, G. J., & Jauniaux, E. R. M. (2015) · American Journal of Obstetrics and Gynecology · doi:10.1016/j.ajog.2015.07.050 · Cited by 354 · see citing works
Cohort Profile: The Rotterdam Periconceptional Cohort (Predict Study)
Steegers‐Theunissen, R. P. M., Verheijden-Paulissen, J. J., van Uitert, E. M., Wildhagen, M. F., Exalto, N., Koning, A. H. J., Eggink, A. J., Duvekot, J. J., Laven, J. S. E., Tibboel, D., et al. (2015) · International Journal of Epidemiology · doi:10.1093/ije/dyv147 · Cited by 123 · see citing works
Self-citationThe human placenta: new perspectives on its formation and function during early pregnancy
Burton, G. J., & Jauniaux, E. R. M. (2023) · Proceedings of the Royal Society B Biological Sciences · doi:10.1098/rspb.2023.0191 · Cited by 76 · see citing works
Reijnders, I. F., Mulders, A. G. M. G. J., van der Windt, M., Steegers, E. A. P., & Steegers‐Theunissen, R. P. M. (2018) · Human Reproduction Update · doi:10.1093/humupd/dmy037 · Cited by 68 · see citing works
Self-citationRousian, M., Schoenmakers, S., Eggink, A. J., Gootjes, D. V., Koning, A. H. J., Koster, M. P. H., Mulders, A. G. M. G. J., Baart, E. B., Reiss, I. K. M., Laven, J. S. E., et al. (2021) · International Journal of Epidemiology · doi:10.1093/ije/dyab030 · Cited by 61 · see citing works
Self-citation3D biomimetic platform reveals the first interactions of the embryo and the maternal blood vessels
Govindasamy, N., Long, H., Jeong, H., Raman, R., Özcifci, B., Probst, S., Arnold, S. J., Riehemann, K., Ranga, A., Adams, R. H., et al. (2021) · Developmental Cell · doi:10.1016/j.devcel.2021.10.014 · Cited by 58 · see citing works
Reijnders, I. F., Mulders, A. G. M. G. J., & Koster, M. P. H. (2017) · Acta Obstetricia Et Gynecologica Scandinavica · doi:10.1111/aogs.13259 · Cited by 36 · see citing works
Rifouna, M. S., Reus, A. D., Koning, A. H. J., van der Spek, P. J., Exalto, N., Steegers, E. A. P., & Laven, J. S. E. (2014) · Human Reproduction · doi:10.1093/humrep/deu273 · Cited by 30 · see citing works
Self-citationFirst‐trimester ultrasound features associated with subsequent miscarriage: A prospective study
Taylor, T. J., Quinton, A. E., de Vries, B. S., & Hyett, J. A. (2019) · Australian and New Zealand Journal of Obstetrics and Gynaecology · doi:10.1111/ajo.12944 · Cited by 27 · see citing works
Mlyczyńska, E., Kurowska, P., Drwal, E., Opydo‐Chanek, M., Tworzydlo, W., Kotula‐Balak, M., & Rak, A. (2020) · International Journal of Molecular Medicine · doi:10.3892/ijmm.2020.4452 · Cited by 27 · see citing works
Miscarriage in contemporary maternal-fetal medicine: targeting clinical dilemmas
BORRELL, A., & Stergiotou, I. (2013) · Ultrasound in Obstetrics and Gynecology · doi:10.1002/uog.12442 · Cited by 26 · see citing works
Effect of micronized progesterone on fetal‐placental volume in first‐trimester threatened abortion
Turğal, M., Aydın, E., & Özyüncü, Ö. (2016) · Journal of Clinical Ultrasound · doi:10.1002/jcu.22384 · Cited by 24 · see citing works
Zhang, Y., & Zhang, Y. (2018) · Cell Biology International · doi:10.1002/cbin.10953 · Cited by 23 · see citing works
PIBF1 regulates trophoblast syncytialization and promotes cardiovascular development
Lee, J. G., Yon, J., Kim, G., Lee, S., Kim, C., Cheong, S.-A., Kim, H., Yu, J., Kim, K., Sung, Y. H., et al. (2024) · Nature Communications · doi:10.1038/s41467-024-45647-8 · Cited by 21 · see citing works
Wang, Y., Zhang, Q., Yin, C., Chen, L., Yang, Z., Jia, S., Sun, X., Bai, Y., Han, F., & Yuan, Z. (2022) · BMC Pregnancy and Childbirth · doi:10.1186/s12884-022-04936-0 · Cited by 19 · see citing works
Reijnders, I. F., Mulders, A., Koster, M. P. H., Kropman, A. T. M., Koning, A. H. J., Willemsen, S., Steegers, E., & Steegers‐Theunissen, R. P. M. (2021) · BJOG An International Journal of Obstetrics & Gynaecology · doi:10.1111/1471-0528.16979 · Cited by 16 · see citing works
Self-citationSundheimer, L. W., Chan, J. L., Buttle, R. A., DiPentino, R., Muramoto, O. T., Castellano, K., Wang, E. T., Williams, J., & Pisarska, M. D. (2018) · Journal of Assisted Reproduction and Genetics · doi:10.1007/s10815-018-1176-7 · Cited by 13 · see citing works
de Vos, E. S., Koning, A. H. J., Steegers‐Theunissen, R. P. M., Willemsen, S. P., van Rijn, B. B., Steegers, E. A. P., & Mulders, A. G. M. G. J. (2022) · Human Reproduction · doi:10.1093/humrep/deac202 · Cited by 12 · see citing works
Self-citationEarly Pregnancy Placental Bed and Fetal Vascular Volume Measurements Using 3-D Virtual Reality
Reus, A. D., der Aa, J. K.-V., Rifouna, M. S., Koning, A. H. J., Exalto, N., van der Spek, P. J., & Steegers, E. A. P. (2014) · Ultrasound in Medicine & Biology · doi:10.1016/j.ultrasmedbio.2014.02.022 · Cited by 12 · see citing works
Self-citationTóth, E., Györffy, D., Posta, M., Hupuczi, P., Balogh, A., Szalai, G., Orosz, G., Orosz, L., Szilágyi, A., Oravecz, O., et al. (2024) · International Journal of Molecular Sciences · doi:10.3390/ijms25031865 · Cited by 13 · see citing works
Wiegel, R. E., Karsten, M. J. H., Reijnders, I. F., van Rossem, L., Willemsen, S. P., Mulders, A. G. M. G. J., Koning, A. H. J., Steegers, E. A. P., Danser, A. H. J., & Steegers‐Theunissen, R. P. M. (2021) · Reproductive Biology and Endocrinology · doi:10.1186/s12958-021-00843-9 · Cited by 10 · see citing works
Self-citationHoek, J., Boellaard, W. P. A., van Marion, E. S., Willemsen, S. P., Baart, E. B., Steegers‐Theunissen, R. P. M., & Schoenmakers, S. (2020) · Andrology · doi:10.1111/andr.12943 · Cited by 9 · see citing works
Self-citationFirst‐trimester hand measurements in euploid and aneuploid human fetuses using virtual reality
Baken, L., Benoît, B., Koning, A. H. J., Willemsen, S. P., van der Spek, P. J., Steegers‐Theunissen, R. P. M., Steegers, E. A. P., & Exalto, N. (2014) · Prenatal Diagnosis · doi:10.1002/pd.4404 · Cited by 7 · see citing works
Self-citationMilnerowicz-Nabzdyk, E., Bizoń, A., & Zimmer, M. (2016) · Reproductive Sciences · doi:10.1177/1933719116660845 · Cited by 7 · see citing works
Hitzerd, E., Reijnders, I. F., Mulders, A. G. M. G. J., Koning, A. H. J., Reiss, I. K. M., Danser, A. H. J., Steegers‐Theunissen, R. P. M., Simons, S. H. P., & Koster, M. P. H. (2020) · Frontiers in Physiology · doi:10.3389/fphys.2020.00006 · Cited by 6 · see citing works
Self-citationThe maternal body mass index and first-trimester placental (vascular) development
Schenkelaars, N., Schoenmakers, S., Faas, M. M., Willemsen, S., de Vos, E. S., & Steegers‐Theunissen, R. P. M. (2024) · Placenta · doi:10.1016/j.placenta.2024.12.015 · Cited by 5 · see citing works
Self-citationde Vos, E. S., van der Meeren, L. E., Koning, A. H. J., Nikkels, P. G. J., Steegers, E. A. P., Steegers‐Theunissen, R. P. M., & Mulders, A. G. M. G. J. (2024) · Placenta · doi:10.1016/j.placenta.2024.01.019 · Cited by 6 · see citing works
Self-citationvan Zundert, S. K. M., Broekhuizen, M., Mirzaian, M., van Rossem, L., Danser, A. H. J., Willemsen, S. P., Griffioen, P. H., Koning, A. H. J., Mulders, A. G. M. G. J., van Schaik, R. H. N., et al. (2024) · Placenta · doi:10.1016/j.placenta.2024.10.006 · Cited by 5 · see citing works
Self-citationSammut, L., Bezzina, P., Gibbs, V., & Calleja‐Agius, J. (2024) · Radiography · doi:10.1016/j.radi.2024.07.022 · Cited by 3 · see citing works
de Vos, E. S., Danser, A. H. J., Koning, A. H. J., Willemsen, S. P., van der Meeren, L. E., Steegers, E. A. P., Steegers‐Theunissen, R. P. M., & Mulders, A. G. M. G. J. (2024) · Angiogenesis · doi:10.1007/s10456-024-09939-3 · Cited by 3 · see citing works
Self-citationPlacental Volume Measurement in Clinical Practice
Hasegawa, J., Arakaki, T., Nakamura, M., Takita, H., & Sekizawa, A. (2015) · Donald School Journal of Ultrasound in Obstetrics & Gynecology · doi:10.5005/jp-journals-10009-1427 · Cited by 3 · see citing works
de Vos, E. S., Mulders, A. G. M. G. J., Koning, A. H. J., SMIT, H. S., van Rossem, L., & Steegers‐Theunissen, R. P. M. (2024) · Clinical Nutrition · doi:10.1016/j.clnu.2024.09.033 · Cited by 3 · see citing works
Self-citationWang, Y., Han, F., Chuanjie, L., Zhang, Q., Yin, C., Teng, Y., & Yuan, Z. (2026) · IEEE Journal of Biomedical and Health Informatics · doi:10.1109/jbhi.2026.3650981 · Cited by 1 · see citing works
Wang, H.-I., Yang, M.-J., Wang, P., Wu, Y., & Chen, C.-Y. (2014) · Journal of the Chinese Medical Association · doi:10.1016/j.jcma.2014.03.005 · Cited by 1 · see citing works
Three-Dimensional Virtual Reality in Early Pregnancy
Rousian, M., Exalto, N., Koning, A. H. J., & Steegers, E. A. P. (2017) · Cambridge University Press eBooks · doi:10.1017/9781139976787.022 · Cited by 1 · see citing works
Self-citationRepeatability of volume calculations of the fetal urinary bladder
Sætherhaug, T., Fasting, M., Røset, M. A., Naylor, M., & Blaas, H.-G. K. (2016) · Bladder · doi:10.14440/bladder.2016.75 · Cited by 1 · see citing works
Ultrasound Scanning in the First Trimester of Pregnancy
Wladimiroff, J. W. (2021) · Cambridge University Press eBooks · doi:10.1017/9781108863049.012
Wang, Y., Zhang, Q., Yin, C., Teng, Y., Han, F., & Yuan, Z. (2022) · SSRN Electronic Journal · doi:10.2139/ssrn.4181708
Steegers‐Theunissen, R. P. M., de Vos, E. S., Mulders, A. G. M. G. J., Koning, A. H. J., SMIT, H. S., & van Rossem, L. (2023) · doi:10.22541/au.168715268.87742483/v1
Self-citation(2024) · The Egyptian Journal of Hospital Medicine · doi:10.21608/ejhm.2024.348715
Timakina, D. N., Bulanov, M. N., & Efremov, V. A. (2024) · Ultrasound & Functional Diagnostics · doi:10.24835/1607-0771-272
Wang, Y., Zhang, Q., Yin, C., Chen, L., Yang, Z., Jia, S., Sun, X., Bai, Y., Han, F., & Yuan, Z. (2022) · Figshare · doi:10.6084/m9.figshare.20444224
Wiegel, R. E., Karsten, M. J. H., Reijnders, I. F., van Rossem, L., Willemsen, S. P., Mulders, A. G. M. G. J., Koning, A. H. J., Steegers, E. A. P., Danser, A. H. J., & Steegers-theunissen, R. P. M. (2021) · Figshare · doi:10.6084/m9.figshare.16928262
Self-citationBachnas, M. A., Andonotopo, W., Dewantiningrum, J., Pramono, M. B. A., Sulistyowati, S., Stanojevic, M., & Kurjak, A. (2025) · Journal of Perinatal Medicine · doi:10.1515/jpm-2025-0124
Bastiaansen, W. A. P., de Vos, E. S., Koning, A. H. J., Berns, L., Klein, S., Mulders, A. G. M. G. J., Steegers-Theunissen, R. P. M., & Rousian, M. (2026) · Placenta · doi:10.1016/j.placenta.2026.05.022
Self-citationPlavsic, S. K., & Honemeyer, U. (2026) · Donald School Journal of Ultrasound in Obstetrics & Gynecology · doi:10.5005/jp-journals-10009-2126
- Authors
- Reus, A. D., El-Harbachi, H., Rousian, M., Willemsen, S. P., Steegers-Theunissen, R. P. M., Steegers, E. A. P., & Exalto, N.
- Affiliations
- Erasmus MC (NL)
- Department of Obstetrics and Gynaecology, Division of Obstetrics and Prenatal Medicine, Erasmus MC; University Medical Center; Rotterdam The Netherlands
- Corresponding author
- Reus, A. D.
- Venue
- Ultrasound in Obstetrics & Gynecology
- Publisher
- Wiley
- Published
- 2013-10-27
- Volume
- 42
- Issue
- 5
- Pages
- 577-584
- ISSN
- 0960-7692 (ISSN-L)
- OpenAlex
- W1790168733
- Cited by
- 46
- References
- 31
- Citations by year
- 2026: 3 · 2025: 1 · 2024: 10 · 2023: 2 · 2022: 4 · 2021: 6 · 2020: 3 · 2019: 1 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 3 · 2014: 4 · 2013: 1
- FWCI
- 3.42
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Ultrasound in Obstetrics and Gynecology (publishedVersion)
- PubMed (publishedVersion)
- EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
- EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
- Topics
- Health Sciences › Medicine › Pediatrics, Perinatology and Child Health › Prenatal Screening and Diagnostics
- Life Sciences › Immunology and Microbiology › Immunology › Reproductive System and Pregnancy
- Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
- Keywords
- first trimester, miscarriage, live birth, VOCAL, 3D ultrasound, reference values, trophoblast growth, gestational sac, measurement agreement
- MeSH terms
- Abortion, Spontaneous, Adult, Female, Gestational Age, Humans, Middle Aged, Pregnancy, Pregnancy Trimester, First, Prospective Studies, Trophoblasts, Ultrasonography, Prenatal, Crown-Rump Length, Imaging, Three-Dimensional, Live Birth, Young Adult, Gestational Sac
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