If they're Prenatals then yes you can take them. It's just biotin that's making your hair and nails grow, which is not harmful at all to the baby.
If you just take regular prenatal vitamins, your hair and nail will grow super fast. Because the prenatal vitamins have vitamin d & foliage acid which helps with hair and nail growth.
Ive found that prenatals make your hair grow faster than hair and nail vitamins
Definitely ask your doctor just to be sure. You dont want to be bcc thing to much of soMething. Believe it or not to much vitamins can be as bad as not enough.
If they're prenatals then tHtz whT they r made 4..taking while pregnant