50960588 General views of King Edward VII Hospital in Central London where Catherine Duchess of Cambridge has been admitted to for Hyperemesis Gravidarum on December 3, 2012. The condition, described as “extreme, persistent nausea and vomiting during pregnancy,” can lead to dehydration and even induce hallucinations. The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby. File photos also included show the happy couple together at a recent event. FameFlynet, Inc – Beverly Hills, CA, USA – +1 (818) 307-4813 RESTRICTIONS APPLY: USA ONLY