<unk>  is the most common vaginal obstruction of congenital origin. Estimates of the frequency of<unk>  vary from 1 in 1000 to 1 in 10,000 females.
Imperforate hymen
Cervical ectropion
Megarectum
Retroverted uterus
Sperm granuloma
Hydrocolpos
Bifid penis
Spermatocele