What Is Early or Premature Menopause and What Causes It?

Early menopause refers to menopause that occurs between the ages of 40 and 45, while premature menopause happens before the age of 40. In both cases, the ovaries stop producing normal levels of estrogen and progesterone earlier than expected, leading to the permanent end of menstrual periods and fertility.

• There are several known causes of early or premature menopause. In many cases, it happens naturally without a clear reason. However, it can also result from:


• Genetic factors, including a family history of early menopause


• Autoimmune disorders, where the immune system attacks the ovaries


• Medical treatments such as chemotherapy or radiation


• Surgical removal of the ovaries (oophorectomy)


• Chromosomal abnormalities, such as Turner syndrome


• Smoking, which is linked to an earlier onset of menopause

Women who go through early or premature menopause may experience typical symptoms such as hot flashes, irregular periods, mood changes, and vaginal dryness, but at a much younger age. Because menopause under 45 increases the long-term risk of osteoporosis, heart disease, and cognitive decline, early diagnosis and treatment are important.

Doctors may perform blood tests to measure hormone levels, including follicle-stimulating hormone (FSH) and estrogen, to confirm the diagnosis. Treatment often involves hormone replacement therapy (HRT) until the average age of natural menopause to help protect long-term health.

Understanding premature menopause helps women make informed decisions about fertility, symptom management, and future health risks with the support of their healthcare provider.