If you have sex right after your period and you ovulate early that month, it's possible to get pregnant. This is more likely with. While women are not able to conceive whilst on their period, sperm It all depends on the length of your menstrual cycle simple, right? You have sex towards the end of your six-day long period and ovulate shortly after. You can only get pregnant on the few days each cycle around ovulation, when an egg is released. you need to get your fertile eggs and your partner's sperm together as often as possible. After this your fertile time will be over for that cycle. .. I had just finished my period on 30 may and I had sex on, may 31, June 3, and.