Irregular periods

Key facts When you first start getting your period, it’s normal for your menstrual cycle to be irregular. For most people, menstrual periods will eventually become regular, but some never develop a regular cycle. There are many lifestyle factors and medical conditions that can cause your periods to become irregular. Treatment depends on the underlying cause. See your doctor if your periods are irregular. Even if it doesn’t bother you, it’s important to check what is causing this and whether it is healthy for you. If your period is late or has stopped, it’s very important to check if you