But you shouldnt be laying on your back after around the 2nd trimester
anyway. Some suggestions are on the exercise
ball or plank holds because it strengthenes your core. But you have to keep it mild, no straining. Anytime you feel strained, stop. Those ab ligaments are easy to pull while you have the relaxin hormones and closer to the end you definitely want to lay off the ab workouts. On the plus side, you can start again right after a natural birth, but not a c section.