Uterine fibroids are leiomyomata of the uterine smooth muscle. The cervix may be duplicated in situations such as bicornuate uterus and uterine didelphys. The majority of women with uterine fibroids will have normal pregnancy outcomes. Fifty percent of uterine fibroids demonstrate a genetic abnormality. Some women with uterine fibroids do not have symptoms. Some risk factors associated with the development of uterine fibroids are modifiable. The exact cause of uterine fibroids is unclear. Women also experience uterine and vaginal contractions. It is not effective for patients with very thick uterine lining or uterine fibroids. Fibroids are a type of uterine leiomyoma. Up to 50% of women with uterine fibroids have no symptoms. Leptin is also expressed in fetal membranes and the uterine tissue. The majority of SCCs of uterine cervix express p16. Pitocin is commonly used to induce uterine contractions. Patients can have pain secondary to uterine contractions, uterine tetany or localized uterine tenderness.