![]() All pregnancies obtained after IVF ET from October 1st 1999 to November 30th 2004 were compared with a control group of naturally conceived pregnancies and matched by maternal age and the number of fetus. Patients and methods: A retrospective, case-control study. To compare the perinatal outcomes of pregnancies obtained by in vitro IVFET vs spontaneous pregnancies. ![]() ![]() Some researchers attributed these results to the increase in the number of multiple pregnancies, pregnant patients older than 35 years, and to the antecedents of infertility. In 1985 the first study was published that showed adverse perinatal results in pregnancies obtained with fertilization in vitro. The conditions of clinical treatment and laboratory improved, which were in greater number of pregnancies. In vitro fertilization embryos transfer, perinatal outcome.ĪBSTRACT Background: In 1978 the first successfull birth by in vitro fertilization took place and this assisted reproduction technique became alternative of treatment in the couples with infertility that had not obtained pregnancy with conventional treatments.
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