I have a rough idea the 1st half of a natural cycle should be around 1.5 to 2 and they like to see anything over 10 after you ovulate to confirm ovulation during a pgd ivf cycle the 1st half of my cycle was 1.5 to 6 just before i had my trigger then it went up to 40+ for the 2nd half and i did not have a embryo TF my FS said my levels were normal hope that helps.