Fetal head circumference and length of second stage of labor are risk factors for levator ani muscle injury, diagnosed by 3-dimensional transperineal ultrasound in primiparous women.

Objective: We evaluated rate of levator ani muscle (LAM) avulsion among primiparae using 3-dimensional transperineal ultrasound to identify possible risk factors for such trauma.

Study Design: We conducted a prospective observational study. Three-dimensional transperineal ultrasound was performed on all subjects.

Prenatal sonographic diagnosis of congenital perineal skin tag: case report and review of the literature.

Background: Skin tags, or acrochordons, are benign, soft, fleshy tumors that are composed of hyperplastic epidermis covering a dermal connective tissue stalk.

Methods: Case report of a congenital perineal skin tag that presented as a perineal tumor during second-trimester sonographic scan at 23 weeks' gestation. Literature review of the medical literature using Pubmed(R) and the search terms acrochordon, fibroepithelial polyp (FEP), and skin tag.