Abstract
To determine whether egg donation (ED) pregnancies are at higher risk of pregnancy-induced hypertension (PIH) than those achieved by autologous assisted reproductive technology (ART; controls). Anonymous comparative observational matched cohort study. Assisted reproductive technology centers. Two hundred seventeen ED and 363 control singleton pregnancies matched at 7-8weeks (pregnancy date, parity, cycle type [fresh/frozen] and women's age). According to French practice, all women were under45. None. Percentage of PIH for ED versus controls. The groups were comparable (mean age, 34.5). PIH was more frequent during ED pregnancies (17.8% vs. 5.3%), as was preeclampsia (11.2% vs. 2.8%) and eclampsia (1.8% vs. 0.0%). In multivariate analyses, PIH risk increased with ED (odds ratio [OR], 3.92; 95% confidence interval [CI], 1.93-7.97) and women's age (OR, 1.08; 95% CI, 1.00-1.16). No significant effect of previous pregnancies or cycle rank/type was observed. This study had sufficient power to detect doubling of the PIH rate. It was demonstrated that the risk of PIH was tripled for ED versus controls. Even in young women, ED is a risk factor for PIH. An immunological explanation seems most likely, that is, the fetus is fully allogeneic to its mother. This risk must be acknowledged to inform couples and provide careful pregnancy monitoring.
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