Bleeding during ovulation, also called ovulation bleeding or spotting, is typically caused by hormonal fluctuations during the menstrual cycle. Around ovulation, estrogen levels drop suddenly while progesterone levels start to rise. This rapid hormonal change can cause the uterine lining to become unstable and shed a small amount of blood, resulting in light bleeding or spotting that is usually much lighter than a menstrual period and lasts just a day or two. The bleeding can also happen due to the follicle rupturing when it releases the egg. This is considered normal and happens in about 5% of menstruating people. Additional symptoms may include mild pain or cramping known as mittelschmerz. However, other causes of mid-cycle bleeding or spotting can include hormonal birth control use, irregular cycles, ovarian cysts, fibroids, polyps, or underlying health conditions such as PCOS or thyroid issues. If the bleeding is heavy, persistent, or accompanied by other symptoms, it is advisable to consult a healthcare provider to rule out other causes. In summary, ovulation bleeding occurs mainly due to hormonal changes around the time of egg release and is generally harmless if light and periodic. If bleeding is unusual or concerning, medical advice should be sought.