AMH is a hormonal study that is commonly ordered early in the infertility evaluation to as part of the assessment of ovarian function. More specifically the test provides some insight into the number and quality of eggs available. When considered in the context of the ultrasound determined antral follicle count, cycle day 3 FSH (follicle stimulating hormone) and estradiol level, the AMH is a simple blood test that can contribute significantly to our understanding of a patient’s prospects for a live birth. It is particularly helpful in assessing the affects of age on ovarian function. One of the attractive features of this particular blood test is that it may be done at any time during the menstrual cycle as opposed to day 3 or 4, when the FSH and estradiol must be drawn.