Age at first birth: an equivocal factor in human mammary carcinogenesis.
D000367:Age Factors; D001943:Breast Neoplasms / Q000453:epidemiology*; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D008423:Maternal Age; D008572:Menarche; D008593:Menopause; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy