A survey of more than 2,000 women found that many reported experiencing menopause-type symptoms in their late 30s and early 40s even though they had not stopped having their periods.

Nina Coslov, lead author and co-founder of Women Living Better, which conducted the survey, says women reporting these symptoms to their healthcare provider might be told that they’re “Too young for perimenopause” or that “It can’t be perimenopause because you are still getting a monthly period.”

She hopes their work will help educate clinicians on how to better prepare women in 30s and 40s for the possibility that they may experience some menopause symptoms before they turn 50.

Learn more about the survey and the symptoms the women reported most often here.