The number of eggs that a woman will ovulate at one time with an ovulation injection is determined by how many basal follicles she has. The number of basal follicles varies from month to month, sometimes a few, sometimes a dozen, so the number of basal follicles in a month is very important. Some women have a large number of basal follicles and can have up to 20 or even 30 eggs collected at a time through ovulation injections. Ovulation injections contain two types of gonadotropins, FSH and LH, which mainly have the effect of FSH, while LH has very little effect on the development of follicles and the secretion of estrogen. Therefore, ovulation injections do not increase the number of eggs, but only promote more maturation of the underlying follicles.