WASHINGTON, DC (WUSA) -- The Duchess of Cambridge suffered from a rare but severe case of morning sickness. This prompted her admission to King Edward VII Hospital in London.
According to the American Pregnancy Association, the condition, called hyperemesis graviadrum can cause severe vomiting, dehydration, headaches and low blood pressure among others.
The symptoms appear between 4-6 weeks of pregnancy and for most women relief comes between weeks 14-20.
Sheri Hamersley, MD of Shady Grove Adventist Hospital talks to 9 News Now's Anita Brikman about this condition. Click on the video tab of this article to see the full interview.