Fertility in relation to the risk of breast cancer.
D000367:Age Factors; D001943:Breast Neoplasms / Q000503:physiopathology*; D003075:Coitus; D003267:Contraception; D005260:Female; D005298:Fertility; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D012306:Risk