Why do uterine fibroids grow larger during pregnancy? Will uterine fibroids during pregnancy affect the fetus?

Why do uterine fibroids grow during pregnancy? This is a question that many pregnant women are concerned about. Uterine fibroids are a common gynecological disease that can grow inside the uterine wall and sometimes grow larger during pregnancy. So, what is the reason for this increase? Moreover, will uterine fibroids during pregnancy have an impact on the fetus?

1. Nutrition needed for fetal growth

During pregnancy, the fetus in the uterus needs adequate nutrition to support its growth and development. These nutrients need to be delivered to the fetus through the uterine wall. However, when uterine fibroids are present, they occupy part of the uterine cavity and may prevent the fetus from getting enough nutrition. Therefore, in order to meet the needs of the fetus, uterine fibroids may increase in size to provide more blood supply and nutrients.

2. Hormone changes

During pregnancy, hormone levels change significantly. In particular, increased estrogen levels may promote the growth of uterine fibroids. Estrogen can stimulate the thickening of the endometrium, providing a better environment for implantation. However, this hormonal change may also stimulate the growth of uterine fibroid cells, causing the fibroids to grow larger.

3. Changes in blood circulation

During pregnancy, blood flow to the uterus increases significantly to ensure that the fetus receives adequate oxygen and nutrients. However, uterine fibroids may affect the normal blood flow to the uterine blood vessels, resulting in limited blood supply to the fetus. In order to meet the needs of the fetus, fibroids may increase in size to increase blood supply and ensure that the fetus receives adequate nutrients.

Will uterine fibroids during pregnancy affect the fetus? Generally speaking, for most pregnant women, the presence of uterine fibroids usually does not have a serious impact on the fetus. However, some pregnant women may experience the following:

1. Increased risk of miscarriage or premature birth

When uterine fibroids are present, the space in the uterine cavity may be restricted, which may affect the development of the fetus. This may increase the risk of miscarriage or premature birth.

2. Abnormal placental position

In some cases, the location of the uterine fibroids may interfere with the normal position of the placenta. This may cause the placenta to implant abnormally, which in turn affects the growth and development of the fetus.

3. Weakened uterine contraction ability

When uterine fibroids are present, the space within the uterine cavity may be restricted and the muscle layer of the uterus may be affected. This may lead to a weakening of the uterine contraction ability and affect the progress of labor.

During pregnancy, uterine fibroids usually increase in size as an adaptive response to meet the needs of the fetus. In most cases, the presence of uterine fibroids will not have a serious impact on the fetus. However, if you suspect that you have uterine fibroids or are concerned about the possible impact on the fetus, please consult a doctor in time for professional advice and treatment.