title: Heritability of fecundity and post-partum sterility: an isolate-based study.
mesh_terms: D000568:Amenorrhea; D001942:Breast Feeding; D005260:Female; D005298:Fertility; D005828:Genetics, Population; D006801:Humans; D011247:Pregnancy; D011792:Quebec; D012107:Research Design; D012923:Social Class