Ah, yes. Lifting while pregnant.
I kept doing it as long as I could, despite the stares from the other gym-goers. (Students, mostly, and completely flabbergasted by the thought that a pregnant woman might still be able to lift.) I think I stopped shortly after a workout during which I rolled off the T-bar row machine.
I guess I'd avoid the technique-heavy Oly lifts. Quite aside from the possibility of whacking your belly, late-stage pregnancy will throw off your balance and your pelvis structure. Not worth it, IMHO. But, you could presumably still squat (maybe lighter), do pullups/assisted pullups, and do pushups, with your hands elevated to give your belly clearance. Planks for core work. OH press/push press. Experiment!
I wouldn't recommend the T-bar row.
The pudgy girl became strong!
K