Prince George and Princess Charlotte will soon be getting another sibling (yay). But unfortunately, Kate Middleton is suffering from the same condition she had during her first two pregnancies: hyperemesis gravidarum (HG).
The Duchess of Cambridge was forced to cancel an engagement yesterday due to complications with her health, and Kensington Palace announced her pregnancy via Twitter.
Read the press release in full ↓ pic.twitter.com/vDTgGD2aGF
— Kensington Palace (@KensingtonRoyal) September 4, 2017
"Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their third child," they said in a statement. "The Queen and members of both families are delighted with the news."
"As with her previous two pregnancies, The Duchess is suffering from Hyperemesis Gravidarum," the statement continued. "Her Royal Highness will no longer carry out her planned engagement at the Hornsey Road Children's Centre in London today. The Duchess is being cared for at Kensington Palace."
HG is known as an extreme form of morning sickness and usually leads to "extreme nausea and vomiting," according to the U.S. National Library of Medicine. While 85 percent of pregnant women experience morning sickness, only 2 percent have HG, reports Parents. (See a doctor if you can't keep down food or liquids for an extended period of time.) The exact cause of the condition is unknown, but it's believed to occur because of the rapidly rising blood level of a hormone called human chorionic gonadotropin.
Kate was first hospitalized for hyperemesis gravidarum in December 2012 when she was pregnant with her son Prince George and again in September 2014 when she was expecting Princess Charlotte. Now she's being treated by doctors at Kensington Palace, hoping to keep her nausea and vomiting under control.
Her husband, Prince William, spoke publicly about his wife's pregnancy for the first time yesterday during a mental health conference in Oxford, England. He announced that welcoming baby number three was "very good news" and that the couple was finally able to "start celebrating this week," according to Express. He also added that "there's not much sleep going on at the moment."
His brother Prince Harry was also asked how Kate was feeling during an engagement and said: "I haven't seen her for a while, but I think she's okay," according to the Daily Express.
As of right now, there's no news on how far along Kate actually is but guessing from the time her previous pregnancies were announced, she might be due around April or May.
Congratulations to the royal couple!