I have been to the salon many times both times I was pregnant. My stylist keeps chemicals from directly contacting my scalp and makes me wear a mask to aviod breathing chemicals. They can be harmful to the baby. She did say however, that its not best for ME to do them b/c you have 2 put your hands over your head, which can cause stress to the baby, so they say. Also, dying your hair weakens it, so during pregnancy, if u think about it, dont do it. Hope that helps.