berg has an example of hymen integrum after the birth of
a fetus five months old, and there is recorded a case of tubal
pregnancy in which the hymen was intact.

Gilbert gives an account of a case of pregnancy in an unmarried woman,
who successfully resisted an attempt at criminal connection and yet
became impregnated and gave birth to a perfectly formed female child.
The hymen was not ruptured, and the impregnation could not have
preceded the birth more than thirty-six weeks. Unfortunately, this poor
woman was infected with gonorrhea after the attempted assault. Simmons
of St. Louis gives a curious peculiarity of conception, in which there
was complete closure of the vagina, subsequent conception, and delivery
at term. He made the patient's acquaintance from her application to him
in regard to a malcondition of her sexual apparatus, causing much
domestic infelicity.

Lawson speaks of a woman of thirty-five, who had been married ten
months, and whose husband could never effect an entrance; yet she
became pregnant and had a normal labor, despite the fact that, in
addition to a tough and unruptured hymen, she had an occluding vaginal
cyst. Hickinbotham of Birmingham reports the history of two cases of
labor at term in females whose hymens were immensely thickened. H. Grey
Edwards has seen a case of imperforate hymen which had to be torn
through in labor; yet one single act of copulation, even with this
obstacle to entrance, sufficed to impregnate. Champion speaks of a
woman who became pregnant although her hymen was intact. She had been
in the habit of having coitus by the urethra, and all through her
pregnancy continued this practice.

Houghton speaks of a girl of twenty-five into whose vagina it was
impossible to pass the tip of the first finger on account of the dense
cicatricial membrane in the orifice, but who gave birth, with
comparative ease, to a child at full term, the only interference
necessary being a few slight incisions to permit the passage of the
head. Tweedie saw an Irish girl of twenty-three, with an imperforate os
uteri, who had menstruated only scantily since fourteen and not since
her marriage. She became pregnant and went to term, and required some
operative interference. He incised at the point of usual location of
the os, and one of his incisions was followed by the flow of liquor
amnii, and the head fell upon the artificial opening, the diameter of
which proved to be one and a half or two inche