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Title: Length of gestation and birthweight in dizygotic twins
Authors: Loos, Ruth ×
Derom, Cathérine
Eeckels, Roger
Derom, R
Vlietinck, Robert #
Issue Date: Aug-2001
Series Title: Lancet. vol:358 issue:9281 pages:560-1
Abstract: Despite the longer gestation of girls, their birthweight is less than that of boys. Because unlike-sex twins provide a natural situation in which to investigate the influence of sex on gestation, we compared birthweight and gestation of 1929 same-sex and unlike-sex dizygotic pairs. Length of gestation in unlike-sex pairs was similar to that of female same-sex pairs, and significantly (0.4 weeks; p=0.02) longer than that of male same-sex pairs. Birthweight of girls from unlike-sex pairs was similar to that of girls from same-sex pairs, but boys from unlike-sex pairs weighed 78 g more than boys from same-sex pairs (p=0.001). These data show that in unlike-sex pairs it is the girl that prolongs gestation for her brother, resulting in a higher birthweight than that of same-sex boys.
ISSN: 0140-6736
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Clinical Genetics Section (-)
Exercise Physiology Research Group
× corresponding author
# (joint) last author

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