The development of the lower uterine segment.
D002584:Cervix Uteri; D005260:Female; D006801:Humans; D010920:Placenta; D010923:Placenta Previa / Q000175:diagnosis*; D011247:Pregnancy; D013997:Time Factors; D014463:Ultrasonography; D014599:Uterus / Q000254:growth & development*