title: [Sex of the first child : a risk co-factor in breast cancer?].
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000453:epidemiology*; D005260:Female; D005602:France; D006801:Humans; D007165:Immunosuppression Therapy; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D011247:Pregnancy; D012306:Risk; D012494:Sampling Studies; D012737:Sex Factors
vernacular_title: Le sexe du premier né : co-facteur de risque du cancer du sein?