A baby who was born at 23 weeks weighing just 1lb 4oz has been discharged from hospital.
The parents of Jacob McMahon have been told he is the most premature twin ever to survive in the UK.
His sister, Emie, was born at just under 22 weeks but did not survive.
Parents Sara Fisher, 25, and Scott McMahon, 26, were told their son's chances of survival were also low when he was born at Bradford Royal infirmary on February 22.
But now Jacob has been allowed to go home.
Ms Fisher told the Telegraph and Argus, in Bradford, how her son now weighs 7lb 3oz.
She said: "You wait so long for it and are grateful for every little thing - feeding him for the first time and giving him his first bath at 105 days old. I took him out in his pram for the first time last Wednesday."