title: In Reply.
authors.affiliation: Department of Obstetrics and Gynecology and Department of Epidemiology, Columbia University and New York Presbyterian Hospital, New York, New York.
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Friedman
authors.forename: Cande V
authors.initials: CV
authors.lastname: Ananth
authors.forename: Jason D
authors.initials: JD
authors.lastname: Wright
mesh_terms: D001003:Anal Canal / Q000293:injuries*; D005260:Female; D006761:Hospitals / Q000706:statistics & numerical data*; D006801:Humans; D022125:Lacerations / Q000453:epidemiology* / Q000209:etiology*; D010502:Perineum / Q000293:injuries*; D011247:Pregnancy