title: A study of cancer, parity and age at first pregnancy.
mesh_terms: D000328:Adult; D000367:Age Factors; D001943:Breast Neoplasms / Q000453:epidemiology*; D002170:Canada; D005260:Female; D005333:Fetus / Q000276:immunology; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D010298:Parity; D011247:Pregnancy; D012306:Risk; D012959:Socioeconomic Factors; D002583:Uterine Cervical Neoplasms / Q000453:epidemiology*; D014594:Uterine Neoplasms / Q000453:epidemiology*