Which gender is more likely to be born early?
It is well known that the sex ratio (proportion male) of preterm infants is higher than that of infants born at term. In the US, among White singleton live births at <37 weeks gestation, ~55% are male, whereas among those born at term, ~50% are male (Cooperstock and Campbell, 1996; Cooperstock et al., 1998).
Are boys or girls born earlier?
WASHINGTON -- Boys are slightly more likely to be born premature than girls, and they tend to fare worse, too, says a new report on the health of the world's newborns. "This is a double whammy for boys," said Dr. Joy Lawn of the London School of Hygiene & Tropical Medicine, who led the team of researchers.
What gender is usually the first child?
Overall, 51.2% of the first births were male.
Which gender is more at birth?
The 'natural' sex ratio at birth is around 105 boys per 100 girls (ranging from around 103 to 107 boys). In some countries, the sex ratio at birth is much more skewed than would occur naturally. Today and in the recent past this is particularly common across Asia and North Africa.