An<unk>  is formed during fetal development when the sinovaginal bulbs fail to canalize with the rest of the vagina. Although some instances of familial occurrence have been reported, the condition's occurrence is mostly sporadic, and no genetic markers or mutations have been linked to its cause.
Imperforate hymen
Cervical ectropion
Megarectum
Retroverted uterus
Sperm granuloma
Hydrocolpos
Bifid penis
Spermatocele