Female age is a very important consideration when estimating the probability for conception. Therefore some tests were developed to determine a woman’s ovarian reserve. The tests can tell a lot about the quantity of eggs a woman has, but it tells us little about the quality of those eggs.

Day 3 FSH and Estradiol (E2) test: By measuring a baseline FSH on day 2-5 of the cycle, if the day 3 FSH is elevated, egg quantity is reduced from what is expected.

Antimullerian hormone, as long as it is in normal range then the woman has enough reserve. if it slow then the woman has low reserve or if it is very high then she has P.C.O

Clomiphene challenge test is a test for cases with poor ovarian reserve that are still showing a normal day 3 FSH.

Antral follicles are small follicles (about 2-8 mm in diameter) that we can see - and measure and count - with vaginal ultrasound. As women age, they have less Antral follicles. When there are an average (or high) number of antral follicles, we tend to get a "good" response and good number of mature follicles. While when there are few antral follicles, we tend to get a poor response with few mature follicles.