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First trimester pregnancy ultrasound findings as a function of method of conception in an infertile population
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First trimester pregnancy ultrasound findings as a function of method of conception in an infertile population
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Journal Article
First trimester pregnancy ultrasound findings as a function of method of conception in an infertile population
2018
Overview
PurposeThe 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.MethodInfertile women, ages 21–50 years 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.ResultsCrown rump length at 6 weeks’ gestation was smaller for conceptions achieved via fresh ET compared with frozen ET in a natural cycle (1.50 vs. 2.50 mm, p = 0.017). Crown rump length was smaller at 8 weeks’ gestation in conceptions achieved via fresh ET compared to frozen ET in a programmed cycle (16.13 vs. 17.02 mm, p = 0.039).ConclusionAmong infertile women, embryo growth may differ between fresh and frozen ET as early as 6 and 8 weeks’ gestation.
Publisher
Springer Nature B.V
Subject
