How many times IVF can be successful varies from person to person. In general, whether IVF can be successful is related to female factors, male factors, embryo factors, etc. It may take 1~2 times or even more times to be successful. 1. Female factor: If there are factors such as inflammation and infection, poor quality of egg cells, thin endometrium, etc. in a woman’s body, it may lead to a lower success rate of IVF and make the number of times of IVF more frequent. 2. Male factor: If the sperm quality of a man is poor, such as low sperm count and poor sperm motility, it may lead to lower success rate of IVF and increase the number of times of IVF. 3. Embryo factor: If the embryo develops abnormally or is affected by external stimuli, it may lead to unsuccessful pregnancy and affect the number of IVF. Therefore, a comprehensive assessment of both men and women is needed for IVF, and the specific success rate cannot be generalized, and IVF needs to be carried out under the guidance of doctors to promote the success rate to become higher.