Most women, about 80 percent, are most fertile during the middle two weeks of their cycle, Based on a 21 day cycle your window of fertility would open on the 3rd day after your period. On a 28 day cycle your window of fertility would open on the 14th day of your cycle.
These are basically statistics that women who use the rhythm method of birth control use to know when and when not to have sex. It is the worst form of birth control with the highest failure rate.
To get pregnant you need to know when in that period of time when you are most fertile that you ovulate and release an egg. It is during this time period, three days prior and three days after that you can conceive a child. There are kits you can get at the drug store to tell you this if you are not pregnant.
My advise is if this was your question you take a home pregnancy test to find out if your pregnant. Follow the package directions as to how long after you had sex as to when to take a test. Then follow the package directions as how to take the test.
IF you are under 18 and still live at home and do not want your parents finding the test kit just prior to when the package you chose says to test.. Purchase the kit. Keep it in your purse until you test. Repackage after use and dispose of it at school or away from home.
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