This site complies with the HONcode standard for trustworthy health information. Will my medication affect my baby? If you have shorter cycles, say 21 days, ovulation happens around day 7 and your most fertile days are days 5, 6 and 7.
There are also saliva tests that check electrolytes in your spit to predict when your estrogen is high. Sexual pleasure can increase the chances of becoming pregnant, but not so much that you need to be concerned that every time you have sex it's the hottest sex ever. Yours may be 21 days, 35 days or somewhere in between — and that's completely fine, fertility-wise.
This hormone is only made in your body when you are pregnant. Because this method helps you understand when ovulation has occurred, it works better for preventing pregnancy by waiting to have unprotected sex until a couple of days after the spike in temperature. How can you detect fertile days?
Please try again.