These tests are performed in order to check your hormone levels. FSH and LH levels measured on day 2-3 are indicative of the quantity and the quality of the oocytes growing in the ovaries. Progesterone levels measured on day 21 of the cycle are indicative of normal ovulation. The following hormones might also need to be checked: prolactin, estrogens, androgens and thyroid hormones. We also recommend that the couple takes the prenatal screening (check up).