Infection with SARS-CoV-2 during the first trimester did not adversely impact perinatal and obstetric outcomes subsequent to in vitro fertilization with frozen embryo transfer: a retrospective cohort study.

PurposeTo investigate the impact of first-trimester COVID-19 infection on the perinatal and obstetric outcomes following in vitro fertilization-frozen embryo transfer.MethodsThis retrospective study was conducted at a university-affiliated IVF center. The infection group included women who contracted SARS-CoV-2 during the first trimester following frozen embryo transfer in China's initial pandemic wave that occurred from 7 December 2022 to 7 January 2023. The control group consisted of pregnant women from the pre-pandemic period, considering the widespread incidence of the disease among the Chinese population during such a large outbreak. The primary outcome was perinatal and obstetric parameters.ResultsA total of 346 pregnant women who tested positive for COVID-19 during the first trimester were included in the analysis, while the control group comprised 705 uninfected women (pre-COVID-19 controls). Perinatal outcomes, such as preterm birth, low birthweight, birthweight Z scores, macrosomia, small for gestational age, large for gestational age, and congenital malformations, showed no significant differences between the infected and control groups in both the unadjusted and confounder-adjusted logistic regression models. Additionally, there were no significant differences between the groups concerning obstetric complications, including gestational diabetes mellitus, hypertensive disorders of pregnancy, placenta previa, preterm premature rupture of the membrane, and mode of delivery.ConclusionThe current study demonstrated that contracting COVID-19 during the first trimester did not adversely impact future obstetric and perinatal outcomes following in vitro fertilization-frozen embryo transfer. This data holds practical significance and offers essential insights for reproductive specialists and obstetricians advising expectant mothers.