I only have a drink or two during my period or a couple days after, say up to CD8. From what I have read and based on when the placenta is formed, I think it sounds safe to drink the entire cycle, but I would rather be cautious. I am also trying to live a lifestyle to what I would if I was pregnant, ie. healthier eating, no alcohol, not being around smokers, that way when it happens, it is an easier transition and with no oops.