Having your partner on top demands increasingly creative gymnastics as your tummy swells. But lying partly sideways allows your partner to keep most of his weight off your uterus. Use the bed as a prop. Your bulge isn't an obstacle if you lie on your back at the side or foot of the bed with your knees bent, and your bottom and feet perched at the edge of the mattress. Your partner can either kneel or stand in front of you.
Deep thrusts can become uncomfortable as the months pass.
Get on top of your partner. It puts no weight on your abdomen and allows you to control the depth of penetration. Enter from a sitting position, which also puts no weight on the uterus. Have faith - where there's a will, there's a way. With a little experimenting, you and your partner are sure to find a technique that works for you.