We measure the level of FSH from the blood to determine several things. Most importantly is the over-all general ovarian reserve health. A good ovarian reserve would be shown with a normal level of FSH in the blood on cycle day 3. Elevation would not rule out the possibility of pregnancy in an infertility client, but does tell us we need to work quickly and do our best to make those eggs and the entire body as healthy and balanced as we can for an optimal environment of fertility.