title: Lactation and post-partum amenorrhoea: a study based on data from three Norwegian cities 1860-1964.
authors.forename: K
authors.initials: K
authors.lastname: Liestøl
authors.forename: M
authors.initials: M
authors.lastname: Rosenberg
authors.forename: L
authors.initials: L
authors.lastname: Walløe
mesh_terms: D000568:Amenorrhea / Q000266:history*; D005260:Female; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007774:Lactation; D009664:Norway; D049590:Postpartum Period; D011247:Pregnancy