Lactation and breast cancer.
D000293:Adolescent; D000328:Adult; D001942:Breast Feeding; D001943:Breast Neoplasms / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007774:Lactation; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy; D012306:Risk; D013997:Time Factors