Pregnancy causes the body to go through some astounding changes — a woman's blood doubles in volume, her rib cage expands, ligaments throughout her body loosen and abdominal organs are shoved aside to make room for an expanding uterus and baby.
Given these dramatic physical transformations, it's not surprising that pregnancy increases women's risk for some unpleasant, and sometimes dangerous, conditions.
"It would be unusual for a woman to not have at least one of those symptoms, if not several," said Dr. Christopher Glantz, a professor of obstetrics and gynecology at the University of Rochester Medical Center in Rochester, N.Y. "It's very uncommon that they portend something more serious."
However,doctors keep a sharp eye out for the warning signs that something serious may be occurring. With regular prenatal visits, a woman should be able to safely navigate the various issues and illnesses that occasionally pop up as her baby bump grows.
Here's a look at nine conditions for which women's risk increases during pregnancy.