N85: Other noninflammatory disorders of uterus, except cervix

N85.3: Subinvolution of uterus

The uterus or womb sits in the pelvis and is pear-shaped. The narrower part extends downward into the vagina and is called the cervix. When a woman is pregnant, the child grows in her uterus.

The uterus normally contracts after it is enlarged or stretched. Sometimes, however, it does not contract completely and does not return to its normal size.