The legislation is aimed at triggering a challenge to Roe v. Wade, the U.S. Supreme Court's 1973 landmark decision which established that women have a constitutional right to an abortion, activists on both sides of the issue previously told Reuters.
The mass resignations from the shadow cabinet will destabilise his leadership, and are likely to trigger a direct challenge.
Less than a fortnight later, Mr Abbott faced a mutiny by backbenchers who tried, unsuccessfully, to trigger a leadership challenge.
However, the only result that might trigger a quicker challenge would be Khan losing in London, where he is favourite to beat Zac Goldsmith.
The latest poll figures and evidence of a strong public aversion to Brown are unlikely to trigger a leadership challenge since many in the party feel they flirted with the option last summer, and no credible alternative to Brown emerged.
Labour MPs remain divided over whether Angela Eagle, the recently resigned shadow business secretary, should formally trigger a leadership challenge on Monday or if another candidate, such as Owen Smith, would be a better option.
The review, by Sir John Jenkins, Britain's former ambassador to Saudi Arabia, was commissioned almost two years ago but publication had been repeatedly put off because of concerns that it would trigger a court challenge.
As Corbyn's spokesman urged dissident Labour MPs to trigger a leadership challenge – which they still believe he would win – the growing band of MPs who have resigned from the shadow cabinet, or refused to serve in the first place, are considering their next move.
The stress reaction can be triggered by a challenge to the physical integrity of the body, or it can occur as a result of some psychological challenge.
The document states that an "election triggered by a challenge to the incumbent" does not involve "the case of a vacancy" so does not require the leader to attract nominations.
