The Shirodkar stitch.
D000022:Abortion, Spontaneous / Q000517:prevention & control; D005260:Female; D006801:Humans; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D013536:Suture Techniques; D013537:Sutures; D002581:Uterine Cervical Incompetence / Q000601:surgery*