Sounds like he might be too unpredicatable to ride or lunge while pregnant.
A safe boring hack might be the way to ride while pregnant if you want to continue.
There are other exercises you can do while pregnant to keep fit
Personally (I too have a horse) I would not ride while pregnant.
Maybe you could show your partner how to lunge him, though he does sound disrespectful on the lunge so perhaps that wont work.
The problem with any decision is not the making it, but the living with any consequence of that decision
You might find the hormones when pregnant put you off the idea of riding anyway
doh, this is an old post, sorry I typed what is soooooo out of date, but may we well elave it now
A safe boring hack might be the way to ride while pregnant if you want to continue.
There are other exercises you can do while pregnant to keep fit

Personally (I too have a horse) I would not ride while pregnant.
Maybe you could show your partner how to lunge him, though he does sound disrespectful on the lunge so perhaps that wont work.
The problem with any decision is not the making it, but the living with any consequence of that decision

You might find the hormones when pregnant put you off the idea of riding anyway

doh, this is an old post, sorry I typed what is soooooo out of date, but may we well elave it now