How do you calculate fertile days?

Get yourself a Fertile Focus online and it is about 29.00. I have one and it is so cool, highly recommed it.

Days when women can get pregnant when they have sex.

The days where you are most fertile.

you have to chart your period it is about 14 days before your next period if you have a normal cycle if you dont have a normal cycle you could use an ovulation kit to see when you are fertile.

ok to really answer this you need to know what your cycle is, whether it is 28 days or 30, 32, 35 anything like that, if it is 28 days the most common cycle, than it is 14 days after the first of...