Answer: How much you show and when depends on many things. Your height, how much you weigh, how much weight you've gained, if this is your 1st or 5th, and even how active you are. If you are gaining weight appropriately, eating well, (baby center has a pregnancy weight gain calculator)and your doctor has not said anything at your prenatal check ups
Consider seven ways to give pregnancy back pain the boot.
Practice good posture. As your baby grows, your center of gravity shifts forward. ...Get the right gear. Wear low-heeled — not flat — shoes with good arch support. ...Lift properly. When lifting a small object, squat down and lift with your legs. ...Sleep on your side.