First, to know how long your menstrual cycles are, track them on the calendar for 2 or 3 months. Your menstrual cycle starts with the day your period starts and stops the day before your next period starts. If you are not sure the number of days in your menstrual cycle, you can use 28 days. This is the normal length of a menstrual cycle.
In order for you to get pregnant, you should have sex before you ovulate, at least two or three days before ovulation - those will be your most fertile days.
How will you know when you're going to ovulate? There are many methods available, ovulation predictor kits or tracking your basal body temperature. Research states that the best time for intercourse is the day you notice the most fertile cervical mucus.
Fertile cervical mucus is cervical discharge that looks like egg-white and usually appears on the days before ovulation. This will be the time you are most likely to get pregnant.
Regardless of what day ovulation happens, pregnancy is more likely to occur if you have sex on a day when fertile cervical mucus is present. This could be because cervical mucus helps the sperm survive and move along.
Waiting for Ovulation is not the Greatest Idea
There are also other reasons not to wait that pertain to fertility itself.
If you try to have sex only when you are ovulating, you are more likely to not get pregnant. If you are just waiting around for ovulation signs, you might miss them or they might occur when you can't have sex at the time.
Sex during six days prior to ovulation does have the possibility of you getting pregnant. If you are going to have sex three or four times a week, regardless of your fertility signs, You're probably going to have sex at least once during this six day period. This will be a lot less stressful than trying to time sex on a few certain days.
Also if you've waited to have sex until have signs of ovulation, and you have not had sex for several days, the sperm your partner has might not be as fertile. You might be at your most fertile time, but he won't be at his peak time.