Are the princes William and Kate expecting twins?

The Duchess of Cambridge would be in the 12th week of gestation,  remain admitted to the King Edward VII Hospital for several days  because they have hyperemesis gravidarum, nausea and vomiting. On Tuesday, Prince William visited his wife for several hours at the health center, after having accompanied the Monday after admission. According to the doctor Peter Bowen-Simpkins, director of the London Women's Clinic, pregnant women suffering from this ailment " can lose up to 10% of their body weight and be very dehydrated. " He also indicated that hyperemesis gravidarum usually occurs more often in multiple pregnancies of twins or twins. "Anyway, do not panic, as this is a condition with minor risks for the mother and baby," he added. Outside King Edward VII Hospital, hundreds of reporters, cameramen and onlookers bet pending more information on the health of the Duchess and her baby. The internment of Catherine took the couple to publicly announce ahead of schedule and the actual pregnancy, for which they received congratulations from politicians, celebrities and public and religious, including the leaders of Australia, New Zealand and the United States. As reported by the BBC,  Kate is receiving intravenous fluids to deal with the symptoms of nausea and vomiting, although his condition is stable.