Rosemary oil during pregnancy?

Have you asked your doctor? You could ask to check if you are deficient in anything as hair issues can be an indicator.

Is rosemary water safe to use while pregnant?

I haven't used it ever, so can't comment from personal experience. There are alternatives like chamomile, lavender etc, maybe try something like that?

I would check with doctor/midwifr if you need maybe extra supplements. Hair tends to be in a good condition during pregnancy, for everyone I know it is after giving birth that it needs extra care.

I would suggest you inquire about this with your doctor, it’ll be the safest thing to do opposed to going off opinions on here. Congratulations in advance as well mama, I hope you have a safe & peaceful delivery ♥️

I would ask your doctor before using it. It can cause uterine contractions, high blood pressure, and hormone changes which can all be dangerous in pregnancy but if you’re using it on your head, it may not affect your uterus as much as if you were diffusing or putting it in a bath. I had used it in a bath to help induce my labour I did immediately feel contractions but it also raised my blood pressure and made me feel really dizzy and sick. That was from just 2 drops in a full bathtub