
© Shutterstock
Doctors may be able to predict as early as a woman's late 30s the age at which she will eventually experience menopause, based on how quickly the levels of one hormone in her blood change, according to a new study.
Researchers studied 293 women in their 30s and 40s, taking blood samples over several years to measure their levels of anti-mullerian hormone, or AMH, which is produced by the ovaries. They found that the amount of year-to-year change in AMH levels provided a good predictor of
when the women experienced menopause.
Currently, the only way to estimate when a woman will enter menopause is by using her age - the average age that menopause occurs is 51, but women can also experience the change in their 40s or late 50s, according to the National Institutes of Health.
The new study showed that AMH levels explained nearly 82 percent of the variability between women.
Additionally, the researchers found that the women whose AMH levels changed the most reached menopause two years earlier on average, compared with women whose levels changed the least.
"AMH levels have added another indicator," of the age menopause will begin, said study author Ellen Freeman, a research professor at the University of Pennsylvania. This is helpful because age "is not a wonderfully accurate predictor, it's just an available predictor," she said.