If a girl has when shes on her peried douse she has a better chanse to get pregnet or dont matere?

It's very rare for a woman to get pregnant while on her period. That's not to say it hasn't happened before, but usually when it does, the egg has already be fertilized before the flow began. It's complicated to explain, but it is definitely possible. The chances are, however, lower when she's on her period than during other times of her cycle, but it can still happen. Pretty much anytime a woman has unprotected , there is a chance she'll become pregnant, no matter what time of the month it is.