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In this case the neck of the uterus was cartilaginous and firmly adherent to the adjacent parts. In seven days after the accouchement the woman had completely regained her health. Vallisneri reports the instance of a woman who possessed two uteruses, one communicating with the vagina, the other with the rectum. She had permitted rectal copulation and had become impregnated in this manner.
In his masterly article on "Heredity," Sedgwick quotes an instance of total absence of the uterus in three out of five daughters of the same family; two of the three were twice married. Double uterus is so frequently reported that an enumeration of the cases would occupy several pages. Bicorn, bipartite, duplex, and double uteruses are so called according to the extent of the duplication.
Hollander describes the following anomaly of the uterus which he encountered during the performance of a celiotomy: "There were found two uteruses, the posterior one being a normal organ with its adnexa; connected with this uterus was another one, anterior to it.
The two uteruses had a common cervix; the anterior of the two organs had no adnexa, though there were lateral peritoneal ligaments; it had become pregnant." Hollander explains the anomaly by stating that probably the Mullerian ducts or one of them had grown excessively, leading to a folding off of a portion which developed into the anterior uterus.
The so-called uterus didelphus is really a duplex uterus, or a veritable double uterus, each segment having the appearance of a complete unicorn uterus more or less joined to its neighbor. Vallisneri relates the history of a woman who was poisoned by cantharides who had two uteruses, one opening into the vagina, the other into the rectum.
He found a uterus of ordinary size and form as is usual at this period of gestation, which contained a full-grown fetus, but only one ovary attached to a single Fallopian tube. On the left side he found a second uterus, unimpregnated and of usual size, to which another ovary and tube were attached. Both of these uteruses were distinct and almost entirely separate. Pregnancy with Double Uterus.
What significance this may have is only a matter of conjecture. Petty describes a case of triplets in which one child was born alive, the other 2 having lost their vitality three months before. Heredity seems to be a factor, and duplex uteruses predispose to multiple births. Ross reports an instance of double uterus with triple pregnancy.
The varieties range all the way from slight increase to two distinct uteruses, with separate appendages and two vaginae. Meckel, Boehmer, and Callisen are among the older writers who have observed double uterus with associate double vagina.
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