4. Exposure to estrogen
In the same way that late menopause is a potential cause of endometrial cancer, early menstrual initiation can also increase your odds of developing it. If you had your first period prior to the age of 12, you could have a higher chance of developing endometrial cancer seeing as your body has had longer exposure to estrogen throughout the course of your life. This is even truer if you had an early menstrual initiation but late menopause as the exposure to estrogen that your body has endured is far greater than that of the average female.
Bear in mind that we’re talking about the actual start of your menstruation, not just any vaginal bleeds. It is easy to distinguish from the two seeing as vaginal bleeds will be an isolated incident whereas your menstrual cycle will be consistent once it begins. If you are unsure as to when you began menstruating, you can ask your parents to jog your memory.