Does progesterone stimulate the growth of uterine fibroids?

Progesterone generally does not directly stimulate the growth of uterine fibroids. The growth of uterine fibroids is mainly related to estrogen levels. Progesterone, as a progesterone, may affect fibroids through indirect pathways, but clinical observations show that its growth-promoting effect is weak.

Uterine fibroids are estrogen-dependent tumors, and their growth is mainly regulated by estrogen receptors. Progesterone has limited stimulating effect on fibroid cell proliferation at physiological doses, and some studies have even found that progesterone may inhibit fibroid growth. When conventional dosage progesterone preparations such as progesterone capsules and dydrogesterone tablets are used to treat menstrual disorders, they usually do not cause a significant increase in the size of fibroids. In clinical practice, doctors who use progesterone drugs for patients with uterine fibroids will still closely monitor changes in the fibroids.

In rare cases, long-term use of high-dose synthetic progestins may affect fibroid growth by upregulating progesterone receptor expression. This type of situation is more common in certain special treatment programs, such as long-term drug control of endometriosis. In addition, individual differences in sensitivity to hormones may also cause a small number of patients to experience slight enlargement of fibroids, but this is usually not persistent.

It is recommended that patients with uterine fibroids undergo ultrasound examination to evaluate the status of the fibroids before using progesterone drugs, and review changes in fibroid size every 3-6 months during the medication. In daily life, you should pay attention to maintaining a regular schedule and avoid taking estrogen-containing health products. Moderate exercise can help maintain hormone balance. If abnormal uterine bleeding or pelvic compression symptoms worsen, you should seek medical advice promptly to adjust the treatment plan.