how likely is it to get pregnant on your period

It is possible but generally unlikely to get pregnant while having sex during your period. Pregnancy is most likely to occur around ovulation, which typically happens about 10 to 16 days before the next period in a typical 28-day cycle. However, sperm can live inside the female reproductive system for up to 3-5 days, so if you have a shorter cycle or ovulate soon after your period ends, sperm from intercourse during your period could fertilize an egg released shortly after menstruation. Also, bleeding during ovulation can sometimes be mistaken for a period, increasing the chance of unprotected sex during fertile days. Therefore, while the chances are low during menstruation, pregnancy during your period is still possible, especially if cycles are shorter or irregular.