It is possible that your partner gets pregnant after having sex during her period, although the chances are lower compared to other times during the menstrual cycle. The likelihood of getting pregnant during your period depends on the length of your menstrual cycle and the timing of ovulation.
Ovulation Dependency
Ovulation typically occurs around 14 days before the start of your next period, but the exact timing can vary from person to person. If you have a shorter menstrual cycle, it’s possible to ovulate shortly after your period ends, which means that there is a higher chance of getting pregnant if you have sex during your period.
Sperm Dependency
Additionally, sperm can live inside the female reproductive tract for up to 5 days, which means that if you have sex towards the end of their period and they ovulate shortly afterwards, there is still a chance of your partner getting pregnant.