To respond to a point made by someone a couple of pages back, antibiotics DO go through to the baby when you're pregnant. All antibiotics do. It's just that some of them don't do the baby any harm, which is why they can be taken. Others on the other hand do a lot of harm, and have to be avoided. (I'm a GP)
Personally I avoided alcohol completely during my pregnancy. I'd been through the hell of fertility treatment, and I was totally paranoid, and not taking any chances with my baby. It seemed like no sacrifice at all to be honest, considering what I'd endured with the IVF!
I get irritated by people defending alcohol in pregnancy, as if it was a basic essential to human life, like air and water.
I think that if a body of experts advises that something may possibly harm your baby, then I'm really not interested in splitting hairs, trying to pick holes in the research. I'll just do as I'm advised - after all, however much I surf the net or talk to consultants, I'm not going to know as much as the people who dedicate years to researching the subject.