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So having sex 3 or 4 days before you ovulate and on the day you ovulate will give you the best chances of getting pregnant. Michelle Stephens Hello, The last day of my period wasMay 16/17, I had unprotected sex on Jun 3rd, according the ovulation calendar I missed the window to get pregnant because my period I due on Jun13th.
Although there is only a 24-hour window during which an egg can be fertilized, sperm can live for three to five days inside a woman's body. So if a woman has unprotected sex three days prior to ovulation, she has a very good chance of getting pregnant. (See How Sex Works for more information.) On the next page, learn how the morning-after pill could lower the risk of pregnancy.