How many follicles can conceive?

According to the size of the follicle to determine whether pregnancy is not accurate, general follicle in the process of development, gradually grow to a diameter of about 18mm when it is possible to ovulation, but also encountered follicles grow to 24-25mm diameter before ovulation, there are also small follicles, such as 16mm follicles on ovulation, there is also a chance of pregnancy. In addition, it depends on how the man's semen is, and the fallopian tube is blocked, which is a necessary condition for conception, so it is impossible to accurately judge only according to the follicle size.