What is Ovulation pain?

Ovulation pain, sometimes called mittelschmerz, is a one-sided lower abdominal or pelvic pain that some people experience around the time an egg is released from the ovary, roughly midway through the menstrual cycle. It can range from a mild twinge to a sharper, more noticeable ache.

It usually lasts anywhere from a few minutes to a couple of days and switches sides depending on which ovary releases an egg that month. It's generally harmless, though it's useful to be able to tell it apart from other causes of pelvic pain.