Applications of field studies to research on the physiology of human reproduction; lactation and its effects upon birth intervals in eleven Punjab villages, India.
D000568:Amenorrhea; D003710:Demography; D005260:Female; D006801:Humans; D007194:India; D007226:Infant Mortality; D007774:Lactation; D008423:Maternal Age; D011153:Population; D011247:Pregnancy; D012098:Reproduction