title: The diameter of the uterine isthmus during the menstrual cycle, pregnancy and the puerperium.
mesh_terms: D000886:Anthropometry; D004864:Equipment and Supplies; D005260:Female; D006801:Humans; D008598:Menstruation; D008722:Methods; D010298:Parity; D049590:Postpartum Period; D011247:Pregnancy; D014599:Uterus / Q000033:anatomy & histology* / Q000502:physiology