The ex-Labour MP sensationally took the Sheffield Hallam seat from former deputy prime minister Nick Clegg in 2017.
Sheffield Hallam MP Jared O'Mara has had the whip suspended while an investigation into his remarks is carried out, Labour said
The Labour MP's constituent Sophie Evans claims he called her an "ugly b****" after an altercation at a Sheffield nightclub.
Labour launched a probe into O'Mara’s alleged remarks a day after he resigned from the Commons Women and Equalities Select Committee.
On Monday Mr O'Mara resigned from the Commons Women and Equalities Select Committee after he joked about having an orgy with Girls Aloud.
Jared O'Mara's made a series of offensive comments, including joking about having an orgy with members of Girls Aloud.