This is a simple blood test used to measure the number of eggs a woman has left, by checking the level of anti-Müllerian hormone (AMH) in your blood. AMH is produced by the primitive eggs in your ovaries – the ones you were born with but which haven’t started growing yet. Once they do start to grow, they stop producing the hormone, so measuring it gives an indication of your fertility potential. AMH testing doesn’t reflect the quality of your eggs, however. Egg quality is more important to your ability to conceive but, unfortunately, we don’t yet have a test for this.