Ventouse or forceps?
Johanson
R B
RB
D036861:Delivery, Obstetric; D005113:Extraction, Obstetrical / Q000295:instrumentation* / Q000592:standards; D005260:Female; D006801:Humans; D009772:Obstetrical Forceps / Q000592:standards*; D011247:Pregnancy; D016032:Randomized Controlled Trials as Topic; D014620:Vacuum Extraction, Obstetrical / Q000295:instrumentation / Q000592:standards