Catherine “Kate” Middleton was hospitalized with hyperemesis gravidarum, a potentially dangerous type of morning sickness where vomiting is so severe no food or liquid can be kept down in the body. “Actually one sign of a healthy pregnancy is nausea and vomiting,” said Dr. Shannon Clark, a maternal-fetal medicine expert and assistant professor in the Department of Obstetrics and Gynecology at UTMB. Clark recently published a paper on the condition in Obstetrics and Gynecology International. “Most women worry about taking medications during the first trimester, but the risk of not being treated outweighs the risk of taking medications. Leaving severe nausea and vomiting unchecked puts not only the mother at risk, but the pregnancy as well,” she stated.