There really isn't truly much that is bad for the baby, honestly... lol I think nicotine, but only because it causes withdrawal, certain medications, because they've been linked with birth defects, and cause withdrawal, and then alcohol... which, to an extent, is actually not bad at all for the baby.. My husband's God mother said she had a glass of wine every single day while pregnant with her daughter, and her daughter is perfectly fine, if not better then fine. So, to answer your question.. No.. They are not. :)