Blame that Morning Sickness on Your Ancient Ancestors Author: Karen Barrow Medically Reviewed On: September 01, 2006 Despite its name, morning sickness—nausea and vomiting that is often one of the first symptoms of pregnancy—can happen at any time of the day. Up to 90 percent of pregnant women experience this less-than-pleasant side effect, yet scientists are only beginning to understand why running to the bathroom and saltines are a rite-of-passage for moms-to-be. Now, new research has shed some light onto morning sickness, and its roots lie in evolution. Researchers from the University of Liverpool suggest that morning sickness may have...