I don't understand this question. You have around 20% chance to get pregnant if you have intercourse around the time of ovulation. you do not get pregnant automatically. Your chances are lower to getpregnant if you have sex any other time before or after ovulation.
You always have to wait and see if you get your menstrual period to test and see if you got pregnant or not. You may or may not get pregnant after trying to get pregnant. Many women spend months or years trying to get pregnant.
I'm sorry i meant to say what the percentage of getting pregnant.. but thanks you answered my questions>>