ENVIRONMENTAL VERSUS GENETIC INTERPRETATIONS OF BIRTH-ORDER EFFECTS.
D001722:Birth Order; D004777:Environment; D005260:Female; D005826:Genetics, Medical; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008423:Maternal Age; D011247:Pregnancy; D014798:Vital Statistics
BIRTH ORDER; GENETICS, HUMAN; INFANT, NEWBORN; MATERNAL AGE; PREGNANCY; VITAL STATISTICS