What a baby looks like and how it will act are, to a certain extent, determined by the genes the child inherits from it parents. But children's environments also play a role in whom they will ultimately become, and that environment starts in the womb.
Most expectant women are warned that drinking alcohol, smoking and even eating unpasteurized cheeses can have serious consequences for the growth and development of their unborn children.
But there are other ways in which a pregnant woman influences the later health of her child.
Nine months is "actually an incredibly short amount of time for so much growth," said Kim Yolton, a professor of pediatrics at Cincinnati Children's Hospital Medical Center. "There are so many things that have to fall exactly into place, or there can be problems," she said.
Here are seven surprising ways that pregnant moms can affect their babies, and tips for how they can protect their pregnancies.