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First trimester pregnancy ultrasound findings as a function of method of conception in an infertile population. Journal of assisted reproduction and genetics von Versen-Hoynck, F., Petersen, J. S., Chi, Y., Liu, J., Baker, V. L. 2018; 35 (5): 863–70

Abstract

PURPOSE: The aim of this study was to determine whether first trimester ultrasound measurements of crown rump length (CRL) and gestational sac diameter (GSD) differ depending on the method of conception among infertile women.METHOD: Infertile women, ages 21-50years old, who conceived viable, singleton pregnancies via fresh embryo transfer (ET), frozen ET, non-in vitro fertilization (IVF) fertility treatment, or spontaneously were included in this observational cohort study at an academic fertility practice. Embryonic growth trajectories defined by the CRL and GSD at 6 and 8 weeks' gestation were analyzed and compared among the methods of conception.RESULTS: Crown rump length at 6weeks' gestation was smaller for conceptions achieved via fresh ET compared with frozen ET in a natural cycle (1.50 vs. 2.50mm, p=0.017). Crown rump length was smaller at 8weeks' gestation in conceptions achieved via fresh ET compared to frozen ET in a programmed cycle (16.13 vs. 17.02mm, p=0.039).CONCLUSION: Among infertile women, embryo growth may differ between fresh and frozen ET as early as 6 and 8weeks' gestation.

View details for DOI 10.1007/s10815-018-1120-x

View details for PubMedID 29380277