I see lots of women asking about core work during pregnancy, what they can/can't do, when they should stop doing sit ups etc. Honestly there is lots of "core" work you can be doing to get your body ready for labor as well as keep as much function as possible through out pregnancy. .
focus is Breathing! This can make "core" work part of almost any exercise.
In my bench press I inhale (belly goes big) as arms go down, exhale and engage my TVA as I press the weights up. I also roll to the side to get off the bench, this is key for later in pregnancy as well as post partum. It stops you from doing that forceful sit up that can put in needed pressure on your pelvic floor as well as core. I also do it for my hips that have already started to loosen up..
➡️ Deadlifts: I love videos, they can really show you where you need to work on form. The first lift you can see my belly is pushed out, second lift you can see my belly was engaged (not suck tummy in). I needed to switch my breathing to exhale as I lift and again engage tva, inhale, belly relaxes as I control it all the way to the bottom of the lift.