نتایج جستجو برای: multiple births
تعداد نتایج: 772313 فیلتر نتایج به سال:
BACKGROUND AND METHODS Prevailing hypotheses about the causes of ovarian carcinogenesis predict that women with a history of multiple births (twins, triplets, etc.) should be at increased risk of epithelial ovarian cancer. However, the scant available evidence suggests that they may actually be at lower risk. To resolve this issue, we pooled data from eight studies involving 2859 parous women w...
women under 20. This followed a rise in the incidence of triplet and higher order multiple births which had started in the late 1970s. Analyses of data for births between 1978 and 1983 showed that while stillbirth, perinatal, neonatal, and post-neonatal mortalities among multiple births fell considerably, they remained consistently higher than those for singleton births. Differences in the dist...
INTRODUCTION Twin studies are a most effective method to analyse gene and environment interactions. Using data from the Singapore National Registry of Births and Deaths (SNRBD), this paper describes the number of twin and multiple births among different ethnic populations in Singapore. MATERIALS AND METHODS All births recorded in the SNRBD from 1 January 1986 to 31 December 2001 were analysed...
There is no national law in the United states concerning the number of embryos that can be transferred into the uterus following fertilization in vitro. However, the American Fertility society (AFs) (later the American society for Reproductive Medicine) (AsRM) first referred to a limitation of numbers to transfer in 1994 (ethics Committee, American Fertility society). The recommendation did not...
BACKGROUND Gestational age and birth weight are the principal determinants of newborn's health status. Chile, a middle income country traditionally has public policies that promote maternal and child health. The availability of an exhaustive database of live births has allows us to monitor over time indicators of newborns health. METHODS This descriptive epidemiological study included all liv...
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