Hi, Welcome to HCM.. Thanks for writing.. It s possible — but highly unlikely.What is the period length? women who has shorter menstrual cycle like 24 day cycle, ovulation occurs on day 10, so intercourse around 7 th day makes sperm available in the genital tract. If the woman have longer cycle, then ovulation occurs late. Sperms can survive in the female genital tract for 72 hrs but ovum can survive only for 24 hrs. Conception occurs when an egg and sperm meet in a fallopian tube. Sometime during the middle of your menstrual cycle, most likely between the 12th and 16th days, an egg reaches maturity in one of the two ovaries. The ovary releases the egg into the abdomen, where it s quickly sucked up by the tulip-shaped opening of the nearest fallopian tube. An egg can survive in your fallopian tube for about 24 hours after it s released from the ovary. So the only way you can get pregnant is if sperm are present in your fallopian tube during this window of opportunity. If the egg isn t fertilized, it s shed along with your uterine lining during your period. Fertile period in a 28 day cycle is 8-18 days. But periods can be mistaken for intermenstrual spotting, in that case time of ovulation varies. So its always better to take a contraceptive measure to prevent pregnancy. Hope i have answered your queries.. Good day.