Since this report quite a number of cases have been recorded.
The different varieties of the hymen will be left to the works on obstetrics.

As has already been observed, labor is frequently seriously complicated by a persistent and tough hymen.
Deficient vulva may be caused by the persistence of a thick hymen, by congenital occlusion, or by absolute absence in vulvar structure.
Bartholinus, Borellus, Ephemerides, Julius, Vallisneri, and Baux are among the older writers who mention this anomaly, but as it is generally associated with congenital occlusion, or complete absence of the vagina, the two will be considered together.
Complete absence of the vagina is quite rare.

Baux a reports a case of a girl of fourteen in whom "there was no trace of fundament or of genital organs." Oberteuffer speaks of a case of absent vagina.

Vicq d'Azir is accredited with having seen two females who, not having a vagina, copulated all through life by the urethra, and Fournier sagely remarks that the extra large urethra may have been a special dispensation of nature.

Bosquet describes a young girl of twenty with a triple vice of conformation--an obliterated vulva, closure of the vagina, and absence of the uterus.