The singer, 49, broke the news in a video message shared to her Twitter account, revealing that the second leg of the tour would be delayed while she and husband Wissam Al Mana, 41, focus on "planning our family."
"We're in the second leg of the tour, and there actually has been a sudden change," Jackson said in the clip. "I thought it was important that you be the first to know. My husband and I are planning our family. So I'm going to have to delay the tour."
"Please, if you can try and understand it's important that I do this now. I have to rest up, doctor's orders. I have not forgotten about you. I will continue the tour as soon as I possibly can."