Wine and pregnant, what?

I'm not saying I'm going to drink wile pregnant. Im not saying anyone should of shouldn't wile pregnant. I heard it a few times that a glass of wine wile pregnant is ok. I guess the French do it ( i have noooo idea that's why I'm asking)
I'm wanting to hear what people think about this on glow. I was told a pregnant woman should avoid alcohol.  Then I was talking to one of my friends and he told me his mom drank during both her pregnancies with him and his sister and they are both fine. Atually his sister is extremely Intelligent. 
Very curious about people's thoughts on this!