Suspended Labour MP Jared O'Mara is returning to work with "immediate effect" after scaling back his duties following a backlash over offensive blog posts.
In December, the Sheffield Hallam MP's office said he was cutting down his activities on the advice of doctors.
The 36-year-old, who has cerebral palsy, has not attended Parliament since.
His office said at the time he would continue to serve voters in his Sheffield Hallam constituency in other ways, but it is unclear how he has done so.
In a statement, Mr O'Mara announced he would now be resuming his duties on a phased return with immediate effect.
He apologised and quit as a member of the Commons Women and Equalities Committee following revelations about a series of homophobic, sexist and derogatory online messages posted in the early 2000s.
Mr O'Mara faced criticism shortly after his election over allegedly homophobic and sexist comments made on social media before he became an MP.
After more recent allegations, including a claim from constituent Sophie Evans that he called her an "ugly bitch" in March 2017 and further details of his online activities in 2009, Labour decided to suspend him.
Mr O'Mara defeated former deputy prime minister Nick Clegg to take the Sheffield Hallam seat in the 2017 general election and is the only member of that intake who has still not made a maiden speech or asked an oral question in the House of Commons.
Hansard records that he last voted in the Commons in October.