Some women have pelvic pain, known as ovulation pain. During the menstrual cycle, ovulation occurs when an egg is released from an ovary. Ovulation often occurs during the second half of the menstrual cycle. "Mittelschmerz" is another name for ovulation pain. The term was coined by combining the German terms for "in the centre of" and "pain." https://www.mybump2baby.com/ovulation-pain-symptoms-causes-and-relief/