If a pregnant woman has fibroids in her 6th month of pregnancy, the fibroids will not cause tummy pain when they are small and will cause tummy pain when they are large. When fibroids are small, stomach pain is usually not experienced because the uterine cavity is larger and smaller fibroids will not cause the space in the uterus to become smaller and will not have an effect on the embryo. When fibroids are large, they can affect the space for the fetus to grow, which can cause uterine contractions leading to tummy pain and also drenching vaginal bleeding. Pregnant women who have fibroids should go to the hospital in time to have a relevant examination, the doctor will determine whether the fibroids are serious according to the examination results, so as to choose the appropriate plan of treatment, if the fibroids are large, you can choose to have them removed surgically after the delivery of the fetus.