According to the guidelines, maximum one or two embryos are required for the younger woman who are taking IVF treatment. Meanwhile, the maximum number of embryos required in IVF procedure is 3 to 4 as the chance of IVF successful is low in the case of older women. The number of embryos is depended on the age factor of a patient.
IVF procedure will only be successfully completed if the embryos formed get implanted in the uterus of the patient. Most of the patients are recommended to utilize around 3 to 4 embryos which automatically increases the IVF success rates of couples. Although, the success rates will depend on various factors and therefore the number of embryos will also vary accordingly.