664 THE REPRODUCTIVE ORGANS OF THE FEMALE. 



The uterus may be only rudimentary while the vagina is normal. It then appears 

 as a flattened solid body with solid cornua. Or there are two eornua joined at their 

 lower extremities so as to form a small double uterus (Fig. 419). Or the uterus is 

 represented by a small sac, which may or may not communicate with the vagina. Or 

 there is a very small uterus, with thin muscular walls and two large cornua. 



Only one of the cornua which should form the uterus may be developed while the 

 other is arrested in its growth. The uterus is then a long, cylindrical body, terminal - 



FIG. 419. UTERUS BICORNIS. 



ing above in one tube. On the side where the horn should have been developed there is 

 no tube, or only a rudiment. Both ovaries are usually present. 



The two cornua may be fully developed, but their lower ends remain separated 

 and form a double uterus. An entire separation into two distinct uteri and vagime is 

 rare. More frequently the uterus consists of one body, divided by a septum into two 

 cavities. There are then two cervical portions of the uterus projecting into a single 

 vagina, or each into a separate vagina. Or there is only a single cervix. The septum 

 in the uterus may be complete or only partial. 



The uterus may be abnormal in size or be variously flexed ; the cervix may be 

 solid or may be closed by the vaginal mucous membrane. Or the cervix may have an 

 abnormal form with a small opening or canal. 



Changes in Size. 



In the new-born infant the uterus is small, the body flattened, the cervix dispro- 

 portionately large. During childhood the organ increases in size, but the body remains 



