s all antectodal, and yes, some (not all) pregnant women seem to get a lusterous head of hair more likely due to the pregnancy hormones than prenatal
vitamins. I never got any
thicker, shinier
hair when I was pregnant. Then again, I never got big boobs either. :(
That being said, many non-pregnant people swear the prenatals do help, and theoretically, it SHOULD assist in new cell growth turnover and hence, thicker hair.