When you’re pregnant, the extra weight and girth shifts your center of gravity forward, which makes it harder to maintain balance even in sensible, flat shoes.Perched up on high heels, the shift in your center of gravity makes stumbling all the more likely. Pregnancy also causes some swelling in the feet and ankles that affects how signals are sent to parts of the brain responsible for maintaining balance. So when you’re pregnant it can be harder to sense which way to shift to stay upright if you stumble. Again, wearing heels will only raise the risk for stumbling in the first place. Experts say that the best shoes to wear when you’re pregnant are wide, flat shoes with soft arch supports and plenty of wiggle room for the toes. When you’re pregnant, your feet may swell more than is normal during the day, making shoes that fit in the morning feel too tight by the evening.