[Midwifery practice of Ainu. 4. Narrow pelvis and protection of the perineal region].
D005260:Female; D006801:Humans; D007564:Japan; D009773:Obstetric Nursing / Q000379:methods; D010384:Pelvic Bones / Q000033:anatomy & histology; D010502:Perineum / Q000033:anatomy & histology