N.O.
You'll get both answers on this one for sure. I got my hair colored and high and low lighted after 12 weeks just b/c I figured it was (like many things) "safer" then. I also drank caffine (my doc told me it was ok to have 300mgs or less a day.) AND (GASP) drank a glass or two of wine once my kids were close to being due...my sister-in-law literally tried to pry the ONE glass of wine I was drinking at a wedding out of my hand when I was in my 8th month with my first - she was horrified I would do something so awful to my baby. I love her to pieces (despite our extremely different opinions) but it's just an example of how worked up people get over this stuff...decide what's best for YOU and YOUR baby and just do moderation - check with your doc on stuff and enjoy your pregnancy - it's awesome!