Roe gives a case of conception in an imperforate uterus, and Duncan relates the history of a case of pregnancy in an unruptured hymen, characterized by an extraordinary ascent of the uterus.

Among many, the following modern observers have also reported instances of pregnancy with hymen integrum: Braun, 3 cases; Francis, Horton, Oakman, Brill, 2 cases; Burgess, Haig, Hay, and Smith.
Instances in which the presence of an unruptured hymen has complicated or retarded actual labor are quite common, and until the membrane is ruptured by external means the labor is often effectually obstructed.
Among others reporting cases of this nature are Beale, Carey, Davis, Emond Fetherston, Leisenring, Mackinlay, Martinelli, Palmer, Rousseau, Ware, and Yale.
There are many cases of stricture or complete occlusion of the vagina, congenital or acquired from cicatricial contraction, obstructing delivery, and in some the impregnation seems more marvelous than cases in which the obstruction is only a thin membranous hymen.

Often the obstruction is so dense as to require a large bistoury to divide it, and even that is not always sufficient, and the Cesarean operation only can terminate the obstructed delivery; we cannot surmise how conception could have been possible.

Staples records a case of pregnancy and parturition with congenital stricture of the vagina.

Maisonneuve mentions the successful practice of a Cesarean operation in a case of congenital occlusion of the vagina forming a complete obstruction to delivery.