Can a blood test diagnose perimenopause?

Unfortunately, there is no blood test to confirm that you are definitely in perimenopause, nor is there a test that accurately predicts when your perimenopause will end. Perimenopause is usually established by taking a careful medical history.

In my experience, the most frequently requested test for perimenopause is a blood test for follicle-stimulating hormone (FSH). FSH is reputed to tell you whether you are perimenopausal or not, and when you can expect to enter postmenopause. In fact, FSH usually cannot give you this information.