This article is from the Infertility FAQ, by Rebecca Smith Waddell firstname.lastname@example.org with numerous contributions by others.
Please note that statistics are in no way individual, so our real odds of
success may be much different from what is listed below.
It often takes a number of perfectly timed cycles before pregnancy is achieved.
The chances of getting pregnant each cycle varies a bit with age. If you are
20-25, your chance per cycle are about 25%. From there they begin to fall off.
At 25-30 your chances are about 20%. At 30-35 they are about 15%. After 35 they
may be about 10% per ovulatory cycle, and the chances continue the downward
This means that the average woman under 30 will get pregnant within 6 cycles.
Women in their early 30s get pregnant on average by the end of 9 cycles. Mid-30s
would be a year. At any age you are considered infertile if you have been having
regular unprotected intercourse for a year without conception; however, women
over 35 should seek treatment after 6 months.