Medical News Today: Why do I have two periods in a month?

While occasional changes in the menstrual cycle are not unusual, frequently experiencing two periods in a month may indicate an underlying medical issue. In this article, learn about the causes of a short menstrual cycle, including perimenopause, thyroid problems, and endometriosis. We also cover when to see a doctor.
Source: Health News from Medical News Today - Category: Consumer Health News Tags: Women's Health / Gynecology Source Type: news