Catherine, Duchess of Cambridge (whose earlier name was Kate Middleton) was discharged from the hospital on Thursday after being treated for acute morning sickness. She looked healthy when she left the hospital with her husband Prince Williams.
The Duchess of Cambridge was admitted to King Edward VII Hospital in central London on Monday following morning sickness, which could have been caused by pregnancy.
St. James' Palace issued a statement saying that the Duchess of Cambridge was discharged from the King Edward VII Hospital and would head to Kensington Palace for sometime to take rest, and thanked that staff of the hospital for taking good care of the Duchess.
The news of the Duchess's bad health came just on the heels of the Royal couple's announcement of their first child.
"Their Royal Highnesses the Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting a baby. The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall and Prince Harry and members of both families are delighted with the news," the couple's official website said.
"The Duchess was admitted this afternoon to King Edward VII Hospital in Central London with Hyperemesis Gravidarum. As the pregnancy is in its very early stages, Her Royal Highness is expected to stay in hospital for several days and will require a period of rest thereafter," according to the official website.
The Duchess, 30, is said to be 12 weeks pregnant with her first child.