There is no such thing as 4 signs of ovulation bleeding, ovulation bleeding is a normal physiological phenomenon. Ovulation bleeding refers to the phenomenon of vaginal bleeding during ovulation, but the amount of bleeding is relatively small, the patient may have breast swelling and pain as well as mild abdominal pain and other phenomena, usually in about two or three days, the bleeding phenomenon will gradually recover. Ovulation bleeding may be related to the decline in progesterone levels, luteal insufficiency after ovulation, oral contraceptive pills, adverse emotional stimulation, long-term dieting, work and life stress, etc. It is a normal physiological phenomenon. But not every woman will have ovulation bleeding phenomenon. In summary, due to the different physical qualities of each woman, ovulation bleeding is normal, women do not need to be too nervous, if accompanied by uncomfortable symptoms can be timely medical examination.