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Publications (1)3.97 Total impact

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    ABSTRACT: To study the association of perinatal outcome and IVF transfer type in a group of infertility patients with standardized treatment and similar prognosis. Retrospective cohort study. University-based infertility center, January 1998 to June 2006. Two hundred eighteen IVF pregnancies after fresh embryo transfer (ET); 122 IVF pregnancies after frozen ET. Assessment of perinatal outcome in fresh versus frozen ET pregnancies. Pregnancy outcomes after fresh versus frozen embryo transfer (ET). Primary outcome was a composite of three events: preterm delivery, intrauterine growth restriction, or low birth weight. Secondary outcomes were subtypes of pregnancy loss. Associations were assessed using multivariate logistic regression. The final sample included 340 pregnancies: 218 fresh and 122 frozen ETs. Singleton pregnancy was less likely after transfer of fresh embryos (odds ratio [OR] 0.39, 95% confidence interval [CI] 0.23-0.67), and pregnancies after fresh ET were more likely to end in first-trimester loss (OR 1.82, 95% CI 1.05-3.13). Composite adverse outcome after transfer of fresh (44.0%) versus frozen (32.6%) embryos was higher (OR 1.52, 95% CI 0.90-2.56) and was strongly associated with twin gestation (OR 23.82, 95% CI 11.16-50.82). Perinatal morbidity is higher in IVF pregnancies conceived after a fresh ET compared with a frozen ET. Although some differences are related to conception with twin gestations, these findings suggest that adverse outcomes may be related to differences in IVF procedures.
    Fertility and sterility 02/2011; 95(2):548-53. · 3.97 Impact Factor