Bleaching Hair. To my knowledge, there's no evidence that the use of topically applied bleach increases the risk of birth defects, though this issue hasn't been well studied. Most likely, very little of the chemical would seep into your bloodstream and get to your baby. If you choose to bleach facial or body hair, you can minimize any potential risk by rinsing your skin with cold water beforehand.
No . No.
Yes. Yes you can bleach your hair while pregnant.