Imagine giving birth to a 20-year-old. Sure, it lets you avoid changing diapers and those trying teenage years, but imagine the labor pains! My middle child was so big that she got stuck on the way out; my youngest was even bigger. Luckily for the 42-year-old mother, however, the 20-year-old baby boy she gave birth to was apparently of normal size. But how, you ask, could a woman give birth to a 20-year-old, baby-sized or otherwise?