Factors That Can Affect Your Period

5. Birth Control

Hormonal birth control can cause changes to your period that are perfectly normal. If you previously experienced irregular periods, you may be surprised at how quickly birth control pills create a more predictable cycle [University of Iowa Hospitals & Clinics]. Many people also experience lighter, shorter cycles while on birth control pills.

Hormonal IUDs can also change your period. In the first few months, your period maybe a little heavier than normal. After that, it is not unusual to stop having a period entirely or just have an occasional day or two of light spotting. It can take up to a year for menstruation to regulate again after the insertion of an IUD.