title: A simple apparatus for estimating the extensibility of the ostium uteri in small laboratory animals.
authors.forename: O M
authors.initials: OM
authors.lastname: DE VAAL
mesh_terms: D000818:Animals; D000830:Animals, Laboratory; D002584:Cervix Uteri; D004864:Equipment and Supplies; D005260:Female; D006801:Humans; D014599:Uterus