title: Lactational amenorrhoea--a survey.
mesh_terms: D000367:Age Factors; D000568:Amenorrhea / Q000503:physiopathology*; D001942:Breast Feeding; D005260:Female; D006801:Humans; D007194:India; D007774:Lactation; D011247:Pregnancy; D012959:Socioeconomic Factors