title: Serum progesterone in women with lactational amenorrhoea.
mesh_terms: D000568:Amenorrhea / Q000097:blood*; D005260:Female; D006801:Humans; D049590:Postpartum Period; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D013997:Time Factors
chemical_list: D011374:Progesterone