20-30% of uterine myomas grow during pregnancy, and this growth is most common in the first 10 weeks. In most women with fibroids, there is no change in the size of the fibroid after becoming pregnant until delivery. In the second and third trimesters of pregnancy, the growth of fibroids can be seen, there is vascular insufficiency, and as a result, some degenerative changes can occur. Clinically, this often causes pain and local tenderness and may lead to preterm labor.During childbirth, uterine myomas can cause laziness of the uterus, fetal position disorders, and obstruction of the birth canal. Large cervical or isthmic fibroids may require caesarean section. Fibroids can cause uterine contraction disorder and lead to bleeding after delivery.If the location and size of the uterine myomas are suitable, it can be removed during caesarean section. However, the removal of some uterine myomas can cause bleeding during pregnancy due to increased blood flow to the uterus. Therefore, myomectomy is not always applied during cesarean section.