
(sz) Preeclampsia, affecting around 5-8% of all pregnancies in the US, annually, is the main etiological factor for both maternal and fetal morbidity and mortality. Previous researches have demonstrated that in contrast to natural conception, women opting for IVF are at an increased risk of developing preeclampsia. A recent study has suggested that the incidence of preeclampsia is higher in IVF-conceived pregnancies; however, no significant association was noted with intrauterine insemination and ovulation induction. The findings of the current study, which corroborated with the earlier results, are published in the journal Hypertension in Pregnancy.
Xi-Kuan Chen from the University of Ottawa, Canada and coworkers conducted a population-based retrospective cohort study to determine the relationship of preeclampsia risk with intrauterine insemination, IVF, and ovulation induction. Based on the data from the 2005 Niday Perinatal Database for Ontario, the study considered all pregnancies achieved with the help of assisted reproductive technology (1,357 exposure subjects and 5,190 controls). The exposure group comprised of subjects who conceived with ART, while a random matching of 4 controls by maternal age, parity, plurality, delivery hospital level and residence area was done for each exposure participant. Conditional logistic regression models were used to analyze the association. Results showed that enhanced risk for preeclampsia was found in subjects who opted for IVF (OR=1.78; 95% CI=1.05, 3.06) after adjusting for confounding factors such as maternal age, smoking during pregnancy, and initiating time of prenatal care. However, intrauterine insemination (OR=2.44; 95% CI=0.74, 8.06) and ovulation induction (OR=1.34; 95% CI=0.31, 5.75) did not show any similar association.
Earlier, Shevell, et al. (Obstetrics and Gynecology, 2005) conducted a study to determine if the use of ART is associated with an increase in adverse pregnancy outcomes, chromosomal aberrations, or fetal malformations. The data was obtained from the First And Second Trimester Evaluation of Risk trial, a large multicenter research of singleton pregnancies. The participants were distributed into 3 subsets: (1) No ART use, (2) use of ovulation induction, with or without intrauterine insemination and (3) use of IVF. The link between adverse pregnancy outcomes and ART was investigated using the multivariate logistic regression models. more…
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