When Morning Sickness Hits An expert explains the nausea that often goes with pregnancy Up to 70 percent of pregnant women suffer nausea from morning sickness, and not always in the morning. Dr. Donald Coustan, Chairman of the Obstetrics and Gynecology Department at Brown University School of Medicine, advises how to relieve the discomfort.
Morning sickness is nausea, with and without vomiting, during pregnancy.
It may occur at any time of day, especially when the stomach is empty. While it is most common during the first three months of pregnancy, it may continue beyond that time and may recur toward the end of pregnancy. But the problem usually goes away by 13 to 20 weeks of gestation. It is not well understood, but many doctors believe that hormonal changes may be involved. Women prone to morning sickness often report that particular odors, sights, or tastes may trigger an episode.