Factors influencing the sex ratio at birth in Australia, 1902-65.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001315:Australia; D005191:Family Characteristics; D005260:Female; D005843:Geography; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012189:Retrospective Studies; D012621:Seasons; D012744:Sex Ratio