This study was undertaken to evaluate the genital anatomy of female newborns. Hymenal configuration and the number and location of clefts, bumps, tags, and ridges were observed in 468 neonates; photographs for confirmation were obtained for 449 neonates (96%). Hymenal configurations observed included an annular hymen with a central or ventrally displaced orifice in 80% (372/468) of neonates, a fimbriated hymen in 19% (90/468), and a septated or cribriform hymen in 1% (6/468). Configurations significantly differed by race (P < .001) but no difference was noted by gestational age or weight. Clefts, which occurred only on the ventral 180 degrees of the rim, were observed in 34% of neonates with an annular hymen. Fifty-six percent of neonates had a longitudinal intravaginal ridge, 87% had an external hymenal ridge, and 13% had a tag extending from the rim or a ridge. Periurethral ligaments were frequently observed. It is concluded that lateral and ventral clefts, intravaginal and external ridges, and periurethral bands are normal anatomical findings in the newborn.
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