Many couples want to know for many many days each month they can get pregnant. on which days each month they need to make love to get pregnant. You can use the BabyMed Fertility calculator to calculate your exact fertile days.
There are several information you need to know first before you can answer this question: When do you ovulate and how long are your menstrual cycles? In general, there are 5-6 fertile days each month: The day of ovulation and the 5-6 days before ovulation. So there are about 6 fertile days each month, 6 days where you are able to get pregnant, 6 days on which making love you can get pregnant.
Assuming you have a 28 day cycle, then you are expected to ovulate about 14 days before the next menstrual period or about 14-15 days into the cycle. With a 28 day cycle your fertile days are cycle days 9-15. With a a 28 day cycle, if you have intercourse on day 12, and ovulate on day 14, you can get pregnant. If you have a 35 day cycle, then you are expected to ovulate on cycle day 21 (35 minus 14 equal 21). So your fertile days will be cycle days 15-21.
So you have about 5-6 fertile days each month.