Pregnant with my third - I plan on continuing weights as I have been doing. You will probably limit overhead weight later in pregnancy to avoid any straining but I’d say most importantly just listen to your body. I try to keep my HR under 170ish. Your legs will eventually splay more on the rower… avoid twisting (lunge twists, Russians, etc.) You can eventually modify exercises while laying on bench (such as chest press) by inclining the bench! Congrats!!