Length of gestation and birthweight in dizygotic twins
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Length of gestation and birthweight in dizygotic twins. / Loos, R J; Derom, C; Eeckels, R; Derom, R; Vlietinck, R.
I: Lancet, Bind 358, Nr. 9281, 18.08.2001, s. 560-1.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Length of gestation and birthweight in dizygotic twins
AU - Loos, R J
AU - Derom, C
AU - Eeckels, R
AU - Derom, R
AU - Vlietinck, R
PY - 2001/8/18
Y1 - 2001/8/18
N2 - 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.
AB - 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.
KW - Analysis of Variance
KW - Belgium
KW - Birth Weight
KW - Female
KW - Gestational Age
KW - Humans
KW - Infant, Newborn
KW - Male
KW - Prospective Studies
KW - Sex Factors
KW - Twins, Dizygotic
U2 - 10.1016/S0140-6736(01)05716-6
DO - 10.1016/S0140-6736(01)05716-6
M3 - Journal article
C2 - 11520531
VL - 358
SP - 560
EP - 561
JO - The Lancet
JF - The Lancet
SN - 0140-6736
IS - 9281
ER -
ID: 258333255