The world is abuzz with news that England’s new princess is expecting a baby; however, the celebratory announcement came on the heels of a serious incident. On December 3, 2012, the Duchess of Cambridge, Kate Middleton, was hospitalized for hyperemesis gravidarum, or severe morning sickness. OB/GYN Dr. Lisa Masterson explains that three out of four pregnant women will experience some degree of morning sickness during their first trimester. Learn what triggers the condition and how to differentiate between typical morning sickness and the more severe hyperemesis gravidarum. Plus, see what foods can help combat the symptoms of morning sickness.