The medical significance of date of birth.
D001723:Birth Rate; D000013:Congenital Abnormalities / Q000453:epidemiology; D005260:Female; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008607:Intellectual Disability / Q000453:epidemiology; D008297:Male; D010507:Periodicity; D011247:Pregnancy; D012621:Seasons