Kielland's forceps.
D001720:Birth Injuries / Q000209:etiology*; D036861:Delivery, Obstetric / Q000009:adverse effects / Q000379:methods; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D009772:Obstetrical Forceps / Q000009:adverse effects* / Q000379:methods; D011247:Pregnancy