What is a day 3 FSH test used for?
The results of the day 3 FSH gives us a rough idea of the number of eggs in your ovaries at a given time. It helps us predict how well you might respond to the fertility medications used in assisted reproductive technologies (ART) like superovulation, IVF, and ICSI. Although day 3 FSH levels may vary from cycle to cycle, it is the highest level of FSH on day 3 that is associated with the potential outcome of treatment. As a result, we may advise a woman not to proceed with ART treatment if her day 3 FSH level is elevated. The methods used to measure the FSH level vary from clinic to clinic, and thus the level above which the FSH is considered to be elevated will vary among clinics. At the Genesis, we consider the upper limit of normal to be 12 U/L. Your physician may use other estimates of ovarian or egg reserve such as a clomiphene challenge test or an antral follicle count.
