One thing that pregnancy has done is zapped my libido. By the end of the day I have no energy, and I'm often somewhat queasy so that doesn't make for a great sex drive. Also, because during the first trimester I had a good deal of spotting and bleeding (apparently quite common, but also quite alarming), this left penetration off the menu. Or at least vaginal penetration, but the lack of energy and nausea negated other choices too.
What I did continue for the first bit of my pregnancy were my weekly bondage lessons. I am trying to improve my rope skills so my rope top would come over once a week and I'd practice my knots. Sometimes TM was there too. Not really participating, but just absorbed in surfing the net while my rope top bound my feet and hands. [as an aside, this is a huge part that makes me adore TM. His kink metre isn't quite as high as mine, but My rope top and I are fully dressed and having a grand old time working on ties and TM respects that as much as he respects my love of snowboarding. Besides, he knows that ultimately he can be the beneficiary of any skills I learn].
And then my old friend fatigue kicked in and my weekly lessons stopped. Recently though I've begun to panic thinking that if I don't have lessons now, I certainly won't have energy for them once the baby arrives. This is also my panic about kink and sex in general. I have hence decided that whatever energy I have left at the end of the day, it will go to at least massaging TM. I need to 'use it or lose it' when it comes to a sex drive. So ironic that when I was single I made a lot of effort to go out and seek partners and experiences and now that I have a source here all the time, I'm asleep. 
I know... welcome to marriage! welcome to pregnancy! the rest of you are saying...