An<unk>  is a congenital disorder where a<unk>  without an opening completely obstructs the vagina. It is caused by a failure of the<unk>  to perforate during fetal development. It is most often diagnosed in adolescent girls when menstrual blood accumulates in the vagina and sometimes also in the uterus. It is treated by surgical incision of the<unk> .
Imperforate hymen
Cervical ectropion
Megarectum
Retroverted uterus
Sperm granuloma
Hydrocolpos
Bifid penis
Spermatocele