updated 12/06/2012 AT 12:50 PM ET
•originally published 12/07/2012 AT 7:15 AM ET
But in light of the fact that the Duchess of Cambridge is also suffering from hyperemesis gravidarum, a form of acute morning sickness, there has been growing speculation that she may, in fact, be expecting twins.
According to the National Institutes of Health, the Duchess’s rare condition tends to appear more often in women carrying twins.
So what would it mean for the royal family if Kate, 30 – who was discharged from the hospital Thursday – were to deliver two little royals? A pair of heirs?
Nope, royal experts tell PEOPLE. In fact, it’s all a bit complicated.