Comparison of the use of the silastic obstetric vacuum extractor to Kielland's forceps.
D036861:Delivery, Obstetric / Q000295:instrumentation*; D005113:Extraction, Obstetrical / Q000295:instrumentation*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D009772:Obstetrical Forceps; D011247:Pregnancy; D012189:Retrospective Studies; D014620:Vacuum Extraction, Obstetrical / Q000295:instrumentation*