Question: what is fibriods caused by and why a woman

Jacinta Nzilani answered on 22 Jul 2025:

👋 Hello! 🧠🔬
Uterine fibroids are non-cancerous tumors that grow in the muscle tissue of the uterus. They’re very common in women of reproductive age and only occur in women because they develop in the uterus, a female organ.

🧬 So, Why Do Fibroids Occur in Women?
Fibroids grow under the influence of female reproductive hormones like estrogen and progesterone, which is why they do not occur in men.

📚 According to Stewart EA (2015) in The New England Journal of Medicine:

“Fibroid growth is stimulated by estrogen and progesterone, explaining their prevalence during reproductive years and regression after menopause.”

🧪 Main Causes and Risk Factors:

1. Hormonal Influence (Estrogen & Progesterone)

Fibroids grow when these hormones are high, such as during the menstrual cycle or pregnancy.

2. Genetics / Family History

If your mother or sister had fibroids, your risk is higher.

3. Race & Ethnicity

Black women are 2–3 times more likely to develop fibroids, and at younger ages.

4. Early Menstruation

Starting periods at a younger age increases lifetime exposure to estrogen.

5. Obesity and Lifestyle Factors

Higher body fat can increase estrogen production, fueling fibroid growth.

🌸 Final Word:
Fibroids are common, non-cancerous, and influenced by hormones and genetics.