Complications

Although uterine fibroids usually aren't dangerous, they can cause discomfort and may lead to complications such as a drop in red blood cells (anemia), which causes fatigue, from heavy blood loss. Rarely, a transfusion is needed due to blood loss.

Pregnancy and fibroids

Fibroids usually don't interfere with getting pregnant. However, it's possible that fibroids — especially submucosal fibroids — could cause infertility or pregnancy loss.

Fibroids may also raise the risk of certain pregnancy complications, such as placental abruption, fetal growth restriction and preterm delivery.