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To estimate the effect of oocyte donation on pregnancy outcomes in patients with twin pregnancies conceived via IVF.Retrospective cohort study.Patients with IVF twin pregnancies delivered by one maternal–fetal medicine practice from 2005 to 2013.Fifty-six patients with IVF twin pregnancies who had oocyte donation and 56 age-matched controls with IVF twin pregnancies who used autologous oocytes. We...
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