Factors associated with the occurrence of perineal lacerations.
D000293:Adolescent; D000328:Adult; D002648:Child; D036861:Delivery, Obstetric / Q000379:methods; D004841:Episiotomy; D005260:Female; D006801:Humans; D007743:Labor, Obstetric; D008423:Maternal Age; D008875:Middle Aged; D009721:Nurse Midwives; D010298:Parity; D010502:Perineum / Q000293:injuries*; D011247:Pregnancy; D012421:Rupture