title: [Human sex ratio and sex-related selection at birth].
abstract: Sex ratio in 11,500 infants died at different perinatal periods (antenatal, intranatal and postnatal) is studied. Sex ratio in these periods is: 107 male : 100 female; 136 male : 100 female; 168 male : 100 female respectively; differences at each period are statistically significant (alpha less than 0.001). A change in differential sex-linked mortality is observed at perinatal period. High mortality in males, which is characteristic of human postnatal ontogenesis, manifests distinctly from the moment of passing on to extrauterine life.
mesh_terms: D005260:Female; D005313:Fetal Death / Q000235:genetics; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D012641:Selection, Genetic; D012737:Sex Factors; D012744:Sex Ratio
vernacular_title: Sootnoshenie polov u cheloveka i otbor, sviazannyĭ s polom pri rozhdenii.