What are my chances of getting pregnant on my fertil days?

1/10: For normal healthy individual, the chances of becoming pregnant having unprotected intercourse during ovulation is about one in 10. This may vary tremendously from individual to individual however.

Better than non-fert: Chances of getting pregnant on fertile days are better than non-fertile days. If you're trying to get pregnant, make sure you're already taking prenatal vitamins to minimize risk of spinal tube defect. And chat w/your family doc or OB for preconception counseling. If you're not trying to get pregnant, then chat w/your doc about some form of contraception or birth control. May need condom for stds.

1 in 15-20?: I don't know if there is science that answers this question but there is research showing that women under the age of 35 take an average of 6 months to conceive. If they tired an average of 3 times each cycle (only a guesstimate by me) that would the odds at 1 in 18 so it is likely in that neighborhood...