Not sure.. I avoided all rides when I was just the fair..
I've always heard no on that front. Is rather air on the side of caution. Plenty of time for all that stuff after the baby:)
The beginning is the time to be most careful.
the first months of pregnancy are hard cuz you can loose your baby easier. and even later in pregnancy doctors recommend you not to cuz you can cause your self to go into pretend labor. I know that its not fair cuz you kinda have to miss out but just don't try any risk it us my opinion. good luck