St. Pierre issued a statement explaining he needed to focus on his health and is looking forward to working with the UFC to determine the next chapter in his professional life.
"Of course, in terms of weight, if I want to go back to compete at 185, I will - obviously eating, like I did what I did, I learned from my mistakes, I don't think it's a good thing to do, force myself to eat to gain muscle mass".
St-Pierre defeated Michael Bisping for the middleweight championship at UFC 217 on November 4.
World War Z Video Game Announced at The Game Awards 2017
Looking at the trailer, World War Z appears to be a survival shooter title, as you try to live against the zombie hordes. Microsoft is doing just that, slashing up to 60% off a range of nominees on the Microsoft Store .
Since then, however, the Canadian superstar has been diagnosed with colitis and he has chose to vacate his title. With the decision, the UFC crowned Robert Whittaker the undisputed champion, a title he'll defend vs. Luke Rockhold at UFC 221 next year.
Helwani reported that it was unclear as to whether Whittaker v Rockhold would be for the interim or official championship.
With this announcement, interim champion Whitaker has been elevated to undisputed champion, and subject to approval from the Combat Sports Commission in Western Australia, the five-round bout will be the first event in Western Australia and held at Perth Arena.
Serena Williams 'has entered' Australian Open
Margaret Court, an Australian has 24 major titles, making her the most successful player in Grand Slam history. Tiley further added that if Serana is able to return and defend her title, it would be a huge achievement.
On Thursday, that plan changed when St-Pierre told the UFC he was giving up the title effective immediately.
Sydney's Whittaker first arrived on the UFC scene when he won The Ultimate Fighter Smashes at welterweight in 2012.
Russia: Syria now 'liberated' from 'Islamic State'
The general also said that Russian forces had in recent days been fighting alongside Kurdish forces near the Syria-Iraq border. The Britain-based Syrian Observatory for Human Rights said 21 civilians were killed, among them 9 children.