. Gynecology : . Fig. 174.—Uterus Biforis. Fig. 175.—Uterus Unicornis. The uterine cavity is single, the cervical canal The adnexa of one side are wanting. Normalis double. Normal in the ant-eater. in birds. (7) Uterus biforis. The canal of the body is normal, but a septum dividesthe cervix completely so that there is a double orifice (Fig. 174). (8) Uterus unicornis. In this form there is complete absence of one-half ofthe uterus (Fig. 175). The foregoing are the essential malformations, but they may assume variousforms as a result of unequal development in the two sides. If both halves of ad

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. Gynecology : . Fig. 174.—Uterus Biforis. Fig. 175.—Uterus Unicornis. The uterine cavity is single, the cervical canal The adnexa of one side are wanting. Normalis double. Normal in the ant-eater. in birds. (7) Uterus biforis. The canal of the body is normal, but a septum dividesthe cervix completely so that there is a double orifice (Fig. 174). (8) Uterus unicornis. In this form there is complete absence of one-half ofthe uterus (Fig. 175). The foregoing are the essential malformations, but they may assume variousforms as a result of unequal development in the two sides. If both halves of adouble uterus develop equally, both may functionate perfectly—i. e., menstruateand conceive. Usually in double uterus one-half is better developed than theother, and if repeated pregnancies take place they occur in the same half. One- 444 GYNECOLOGY half may be diseased with cancer or bacterial infection, while the other remainsentirely unaffected. The opening of one-half of a double uterus may becomeclosed,