The best chances for IVF success in first attempt is 40% to 75%. However, there is no guarantee of success in the IVF cycle. The average rate of success per cycle is 20% to 35%. There is a study which shows that the average number of cycles is 2.7 which is required for achieving success with IVF procedure. The best number of IVF cycles for success is six attempts.
IVF success rates in the first time range from 60% to 80% depending on the health status of the patients. IVF success rates are high when the number of IVF cycles are repeated. Therefore, my IVF doctor asked me to opt for further IVF cycles before we gave up.