I assume you mean "menses" - during your period. Depends on your personal preference, I guess. My ex-wife and I used to have sex during her menses unless she had a particularly heavy flow. She was horny, we were young, and just went at it. I just didn't look down afterwards and she always "cleaned" both of us up. Not an issue for me.
its k to have sex during ur mensus if there is no problem with both of u..but u have to be very hygenic in that situation because in that period the chance of getting an infection is pretty high.