Prince William’s next overseas tour has just been announced. The Duke of Cambridge will be visiting Kuwait and Oman from Dec. 1 to 4.

In the statement released by Kensington Palace, it was confirmed that Prince William will fly solo to both countries. His wife, Kate Middleton, is expected to stay in London during her husband’s three-day tour.

“This visit is at the request of the Foreign and Commonwealth Office and will be His Royal Highness’s first official visit to both countries.  Throughout the visit, The Duke will have the opportunity to meet with a broad range of Kuwaitis and Omanis, including children and young people, leaders from government, inspiring conservationists, and those working in the charity sector,” the statement read.

Royal fans are convinced that Middleton’s non-attendance is due to her fourth pregnancy. If the Duchess of Cambridge is expecting her first child with Prince William, it is likely that she’s still in the first weeks of her pregnancy. After all, the mom of three still doesn’t have a growing baby bump.

During her first three pregnancies, Middleton suffered from hyperemesis gravidarum or extreme morning sickness. As such, she will most likely experience the same problem with her fourth pregnancy.

The Duchess of Cambridge scaled back her royal duties during the first few weeks of her pregnancies with Prince George, Princess Charlotte, and Prince Louis. And she may do the same with her fourth pregnancy.

Meanwhile, Express is convinced that Middleton dropped a major pregnancy clue earlier this week. The future Queen attended the Royal Variety Performance with Prince William on Monday night. During the first two times that she attended the event, Middleton was pregnant with Princess Charlotte and Prince Louis.

As such, the publication is convinced that Middleton’s attendance is a clue that she’s expecting another baby. However, the palace still hasn’t made an announcement regarding the Duchess of Cambridge’s alleged pregnancy.

Kate Middleton Royal Wedding of William and Kate +38. Comrade King/Flickr