FSH levels differ depending on what day of the month they are tested on. The general base is to get a cycle day 3 FSH. Anything under a level of 10 is considered to be within normal levels that would allow for pregnancy to occur. Anything over 10 means that the ovarian reserve is getting low or the remaining eggs are of poor quality. FSH levels can also differ from month to month. A woman trying to get pregnant could well get an FSH level of 15 one month and would have a poor chance of achieving pregnancy but could get a level of 9.5 the next month and achieve pregnancy.
If you are testing for menopause, the most accurate results occur after you have ceased to have a period.
A woman with an FSH of 40 for instance would be considered to have a very poor remaining ovarian reserve but could still get pregnant if she happened to ovulate one of her few remaining good eggs. Testing FSH levels to determine if you are peri-menopausal is considered to be highly inaccurate since the levels can vary so much depending on egg quality and quantity.
A result of 4.7 on cycle day 3 would be like hitting a gold mine for a woman trying to get pregnant. On the cycle that I got pregnant with my youngest son, my FSH levels were 7.5 on day 3.
Last edited by Wizard; 08-11-2006 at 04:39 PM.