First, the ovaries are enlarged. Our normal ovaries are 1*2*3cm in size, just like the size of a thumb, but when the ovaries are overstimulated, they may be bigger than the uterus, we know the DISCO lights in KTV, the ovaries are like lights with black holes on them, so the first thing that shows is the increase of ovarian volume. Second, there is ascites, the patient has different amounts of ascites, severe ascites may have 4000-5000ml of fluid in the whole stomach. Thirdly, because of the enlarged ovaries and ascites, the patient will have abdominal distension and abdominal pain, and because of the large amount of fluid in the body cavity, the patient will not be able to urinate after the pressure of ascites, and will have less urine, and the blood volume in the blood vessels will be reduced, which will cause hypovolemia, and the patient will easily become dizzy and have blood concentration, which will lead to the formation of blood clots, and the most serious one is the formation of blood clots, which may lead to the patient’s life threatening. These are the signs of overstimulation after ovulation promotion.