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Your baby doesn’t have much room to maneuver now that he’s over 18 inches long and tips the scales at 5 1/4 pounds (about the size of a honeydew melon). Baby’s kidneys are fully developed now, and their liver can process some waste products. Most of their basic physical development are now complete. They’ll spend the next few weeks putting on weight. Your uterus, which was entirely tucked away inside your pelvis when you conceived, now reaches up under your rib cage. Your ballooning uterus is crowding your other internal organs as well, which is why you probably have to urinate more often and may be dealing with heartburn and other gastrointestinal distress. If you’re not grappling with these annoyances, you’re one of the lucky ones. If your legs are swelling up, you can try these things: Put your feet up as much as possible, avoid crossing your legs or ankles and stretch your legs frequently while sitting.