The parents of Charlie Gard urged a High Court Judge to allow their son to undergo experimental treatment in the US.
Chris Gard and Connie Yates, of Bedfont, desperately want to give their eight-month-old son who suffers from a rare genetic condition the chance to "improve".
A lawyer representing the couple, both in their 30s, said on Friday (April 7) the little boy should be given a chance.
Barrister Sophia Roper told the judge Charlie would not suffer significant harm if he underwent treatment in America, for which his parents had raised £1.2 million .
However, specialists at Great Ormond Street Hospital (GOSH) said Charlie was for the most part unable to move and had significant irreversible brain damage.
Today, a lawyer representing the hospital's specialists said a number of "world-renowned" experts agreed.
Debra Powell QC said the parents had given their son "complete and unwavering" love and support but Charlie should not get long-term life support treatment because his "quality of life" was "so poor".
All week Mr Justice Francis has heard evidence from specialists from London and the US, in the life support treatment battle of Charlie.
Doctors say the baby boy, who has brain damage and suffers from a form of mitochondrial disease - a condition which causes progressive muscle weakness, should be moved to a palliative care regime.
However his parents disagree and want to take their son to a hospital in America for a treatment trial.
The judge will analyse evidence from the hearing in the Family Division of the High Court, and a decision must be made in Charlie's best interests.
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