hey, i found thru search engine some info on hair & beauty for preggies..
http://www.drspock.com/article/0%2C1510%2C23484%2C00.html
Here's an excerpt
Your Hair
Hair Color -- If you colored your hair before getting pregnant, you're probably wondering whether it's still safe. Unfortunately, there isn't an easy answer. Since the scalp is a very absorptive surface, small amounts of chemicals do get into the bloodstream when you dye your hair. In animal studies, hair chemicals have been linked to birth defects. However, this occurred when there was a significantly larger exposure to the chemicals than you get with a routine hair-color treatment. At the same time, other studies conducted on humans indicate that it is safe to color your hair while pregnant. The bottom line is that the research is still quite limited. Many doctors suggest waiting until the second or third trimester to dye your hair--since the first trimester is when your baby's development is most vulnerable to outside factors. Also, it may be preferable to highlight just some of your hair (see below) rather than color it completely, since highlighting requires less chemicals and less of the scalp is exposed to the dye.
Highlights -- When hair is highlighted (as opposed to completely colored), the hair-dye chemicals are less-likely to sit directly on the scalp and have less opportunity to be absorbed into the body. This may be safer than overall hair coloring, so if it works well for you, it may be a better choice during pregnancy.
Perms and Straighteners -- Like hair coloring, getting your hair permed or straightened also involves chemicals that come into contact with the scalp and can get absorbed into the bloodstream. Most research, albeit limited, does indicate that it is safe to perm your hair while pregnant. As with hair coloring, doctors often suggest waiting until the second or third trimester, when your baby's development is no longer as vulnerable to outside factors.
Your Nails
Nail Polish, Acrylics, Wraps, etc. -- For many pregnant women, indulging in a manicure or pedicure every now and then is a great way to pamper themselves and lift their spirits. In addition, as your belly grows, it often gets increasingly difficult to trim your toenails (not to mention paint them), making a pedicure all the more useful. While there is no evidence of any true danger associated with getting a manicure or pedicure during pregnancy, the chemical fumes that sometimes go along with these treatments can make you feel ill. Try to make sure that you are in a relatively open area with sufficient ventilation, and that you are not exposed to the vapors for a long period of time.