Ovarian hyperstimulation syndrome is a medical disorder that occurs during IVF ovulation treatment. Ovarian hyperstimulation syndrome usually occurs 3 to 7 days after HCG injection and may result in abdominal distension and pain, nausea, vomiting, thirst, low urine and inability to eat, so the main focus is on rehydration at first. You can eat high-protein, easy-to-digest foods such as millet porridge, soy milk, milk, winter melon, pork ribs soup, eggs, fish and shrimp high-protein foods, and more diuretic fruits and vegetables, and then gradually return to normal diet. The diet should be high in protein and light, but should be rich in nutrients and balanced to ensure the body’s energy and metabolic needs. Get plenty of rest and moderate activity to prevent torsion of enlarged ovaries. If you find abdominal distension and low urination, do not be nervous, but go to the hospital promptly and give infusion treatment. If ovarian hyperstimulation syndrome occurs during the IVF-ET cycle, the embryos should be frozen and preserved for the time being, and then transferred in a later natural cycle.