Last week's unanimous decision stripped away federal criminal penalties related to abortions - but not the many local laws banning the procedure, which remain on the books in 20 of Mexico's 32 states.
Employees at government health facilities will no longer need to worry about federal penalties for carrying out an abortion, and the ruling is expected to provide pro-choice activists with a powerful precedent.
But campaigners cautioned that many facilities and medical workers are likely to continue refusing to carry out terminations - sometimes if the woman is unable to prove she does not have the means to care for a child.
"Though this is a big deal, it could still be very difficult for people to get abortions," said Tyler Mattiace, a Mexico researcher at Human Rights Watch. "In some places, they will still likely refuse access to women, for many different reasons... We're going to have to see whether the effect is immediate, or whether this ruling really only affects the criminal system."
Mexico's congress will also need to pass an accompanying resolution to remove abortion from the country's penal code in order for the legalisation to become a reality.
Denne historien er fra September 15, 2023-utgaven av The Guardian Weekly.
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Denne historien er fra September 15, 2023-utgaven av The Guardian Weekly.
Start din 7-dagers gratis prøveperiode på Magzter GOLD for å få tilgang til tusenvis av utvalgte premiumhistorier og 9000+ magasiner og aviser.
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Finn family murals
The optimism that runs through Finnish artist Tove Jansson's Moomin stories also appears in her public works, now on show in a Helsinki exhibition
I hoped Finland would be a progressive dream.I've had to think again Mike Watson
Oulu is five hours north from Helsinki by train and a good deal colder and darker each winter than the Finnish capital. From November to March its 220,000 residents are lucky to see daylight for a couple of hours a day and temperatures can reach the minus 30s. However, this is not the reason I sense a darkening of the Finnish dream that brought me here six years ago.
A surplus of billionaires is destabilising our democracies Zoe Williams
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'What will people think? I don't care any more'
At 90, Alan Bennett has written a sex-fuelled novella set in a home for the elderly. He talks about mourning Maggie Smith, turning down a knighthood and what he makes of the new UK prime minister
I see you
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Rumbled How Ali ran rings around apartheid, 50 years ago
Fifty years ago, in a corner of white South Africa, Muhammad Ali already seemed a miracle-maker.
Trudeau faces 'iceberg revolt'as calls grow for PM to quit
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Lost Maya city revealed through laser mapping
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'A civil war' Gangs step up assault on capital
Armed fighters advance into neighbourhoods at the heart of Port-au-Prince as authorities try to restore order
Reality bites in the Himalayan 'kingdom of happiness'
High emigration and youth unemployment levels belie the mountain nation's global reputation for cheeriness