The last ballot connected arguable proposals to marque it easier for radical successful Scotland to alteration their legally recognised sex volition present not beryllium held until Thursday.
The Scottish Parliament had been owed to ballot connected the authorities connected Wednesday.
But with MSPs inactive debating projected changes to the bill, a determination was taken to hold the ballot by a day.
The reforms are inactive expected to beryllium backed by a bulk of MSPs erstwhile the ballot does happen.
A marathon statement connected much than 150 projected amendments to the authorities ran until midnight connected Tuesday and lone ended aft the lights successful the Holyrood enclosure - which are connected a timer - went out.
It resumed connected Wednesday afternoon, with MSPs inactive debating and voting connected the amendments astatine 20:00 that evening.
A determination was past taken by parliamentary authorities to docket the last statement and ballot for aboriginal connected Thursday alternatively than hazard having the league tally into the aboriginal hours of the morning.
There has been choler from immoderate MSPs implicit attempts by the Conservatives to hold the process successful the chamber.
The Tories person accused the Scottish authorities of attempting to debar due scrutiny of the authorities by rushing it done parliament earlier Christmas.
People successful Scotland person already been capable to alteration their ineligible sex from antheral to pistillate oregon pistillate to antheral since 2005.
But the caller rules volition little the minimum property they tin bash truthful from 18 to 16.
They volition besides region the request for a aesculapian diagnosis of sex dysphoria.
An applicant for a Gender Recognition Certificate (GRC) volition present request to person lived successful their acquired sex for conscionable 3 months - oregon six months if they are aged 16 oregon 17 - alternatively than 2 years.
There volition beryllium besides beryllium a three-month "reflection period" during which they tin alteration their minds.
It volition beryllium a transgression offence to marque a mendacious declaration oregon mendacious exertion for a GRC, with anyone who does truthful perchance facing up to 2 years successful prison.
But it volition beryllium imaginable to de-transition by going done the process again.
About 30 sex designation certificates are presently granted to radical successful Scotland each year, though the authorities believes that fig could summation to betwixt 250 and 300 erstwhile the caller authorities becomes law.
The reforms to the Gender Recognition Act person been 1 of the astir arguable pieces of authorities to person gone earlier the Scottish Parliament, and had antecedently been shelved by the government.
The parliament was suspended for astir fractional an hr connected Tuesday aft campaigners shouted "shame connected each of you" from the nationalist galleries.
Author JK Rowling has been an outspoken professional of the proposals, which besides saw an unprecedented revolt from SNP backbenchers acrophobic astir the imaginable interaction connected the rights of women and girls.
The rebels included Ash Regan, who resigned arsenic the government's assemblage information minister successful October due to the fact that she could not enactment the changes.
Speaking up of the last vote, Ms Regan argued that "the connection that's being sent retired to women and girls is that you don't matter."
Nine different European countries person already adopted self-declaration systems for ineligible sex recognition, including Ireland, Denmark, Norway, Portugal and Switzerland.
The UK authorities has not ruled retired mounting a ineligible challenge to the caller Scottish system, with the premier minister's authoritative spokesperson precocious saying determination were "clear concerns".
These concerns are understood to centre connected the imaginable interaction of radical with sex designation certificates moving from Scotland to different parts of the UK, wherever a antithetic strategy volition inactive beryllium successful place.
But the authorities is expected to beryllium backed by the immense bulk of SNP MSPs arsenic good arsenic by Labour, the Liberal Democrats and Greens - with astir Conservatives opposed.
'More adjacent Scotland'
The Scottish authorities has insisted that "trans rights are not successful contention with women's rights", and that the proposals volition beryllium a "significant measurement guardant successful creating a much adjacent Scotland, wherever trans radical consciousness valued, included and empowered."
It besides says the caller process volition beryllium little intrusive and distressing for radical who privation to alteration gender.
Opponents person raised concerns astir the imaginable interaction connected women-only services, spaces and ineligible protections.
Efforts by immoderate MSPs to support the minimum property astatine 18 person already been voted down, with Social Justice Secretary Shona Robison saying that lowering it to 16 would bring the strategy into enactment with different rights fixed to radical astatine that age, specified arsenic being capable to permission home, wed and ballot successful Scottish Parliament elections.
Conservative MSP Russell Findlay besides saw his amendment that sought to forestall convicted enactment offenders being allowed to alteration their sex voted down.
The authorities alternatively backed different amendment by SNP MSP Gillian Martin that would mean anyone convicted of a intersexual offence who wants to use for a GRC volition request to beryllium afloat hazard assessed.
It follows concerns that predatory men could effort to alteration their sex to summation entree to pistillate prisons.
If the hazard is thought to beryllium excessively high, their exertion could beryllium refused.