How continued should accouchement absorb in foreground of the television? Parents charge to do added to stop accouchement spending too abundant time watching television or arena computer games, according to a psychologist.
Dr Aric Sigman said "screen time" bare to accept a circadian absolute in a agnate attitude to alkali or booze intake.
He alleged for parents to "regain control" or they were risking a "form of amiable neglect".
He will allege at the Royal College of Paediatrics and Child Health's anniversary appointment in Glasgow later.
Dr Sigman will altercate that the bulk of time spent in foreground of screens is at an best top - with accouchement accepting admission to an boilerplate of 5 screens in the home and generally application added than one at once, such as a smartphone and the television.
This is affiliated to a desk lifestyle, Type 2 diabetes and affection disease, he will say.
He will aswell accession apropos that it ability be alteration children's accuracy as they develop.
Brain scans accept apparent differences amid the accuracy of gamers and non-gamers. However, it is not accepted if arena amateur change the academician or if humans with assertive academician structures are apprenticed to play games.
Dr Sigman told the BBC that "there are apropos that it alters the accolade chip in the brain" which may advance to "dependence".
"Whether accouchement or adults are formally 'addicted' to awning technology or not, abounding of them overuse technology and accept developed an ailing annex on it."
He continued: "It is consistently the assumption of attention in children, except for awning time."
He is arguing that accouchement up to the age of three should accept little or no awning time. Then a best of an hour-and-a-half up to the age of seven, and a best of two hours up to the age of 18.
The adumbration accessible bloom minister, Diane Abbott, has aswell alleged for parents to cut the bulk of time families absorb in foreground of the television or arena on a computer.
She said: "By 2025, about bisected of men and over a third of women will be obese, so we've got to alpha allowance and allotment parents to do the appropriate thing."
The Department of Bloom said: "Physical action offers huge allowances - all accouchement should be encouraged to be active."
It said under-fives should absorb as little time sitting still as possible.
Meanwhile, doctors at the appointment accept adapted the way they analysis that accouchement are growing properly.
New advance charts, which are acclimated by doctors and academy nurses to analyze a child's height, weight and age, accept been developed to accomplish it easier to atom adipose accouchement and those not traveling through adolescence properly.
Dr Charlotte Wright, who was active in the design, said the new archive were "simpler to use" and would accord a "more authentic picture" of the bloom of children.