First of all, yes, it is possible for a woman to fall pregnant during menstruation. However, for that to happen, the following conditions have to be met:
– ovulation takes place relatively early in the cycle, and
– sperm survive from the end of menstruation until ovulation.
Even if this sounds highly unlikely, it is not impossible. If the first half of the cycle is shorter, the time of ovulation may shift forward accordingly. That means it may take place earlier in the cycle. In that case, if sperm cells survive in the uterus or the fallopian tubes until the day of ovulation, fertilisation and subsequent implantation of the egg are possible, albeit all in all, quite improbable. However, it is definitely incorrect to claim that it is impossible for a woman to be infertile when she’s on her period. Therefore it’s incorrect to say that she’s unable to fall pregnant during menstruation.
breathe ilo helps you to understand your body better by telling you when you’re fertile.