"It is quite a problem and we think it is on the increase, " said Dr Simon Eaton, from the Institute of Child Health at University College London.

BBC: Amniotic fluid 'may heal premature baby gut'

Simon Gray's other plays include Wise Child, Otherwise Engaged, The Common Pursuit and Butley.

BBC: Rowan Atkinson to star in Simon Gray play in West End

Dr Simon Newell, vice-president of the Royal College of Paediatrics and Child Health, said he broadly agreed with the conclusions of the researchers but stressed that poor weight gain was something which needed to be monitored closely.

BBC: Slow-growing babies 'catch-up' by teens

At Manchester Crown Court, prosecutor Simon Phillips QC said Mr Rigby made a "wicked attack on a defenceless child".

BBC: Rio Smedley

Both Simon and Glass say parents in the U.S. often lack the proper support, child care and assistance to raise a child.

CNN: Does having children make you happy?

Tracks from Atomic Kitten, Eminem, Destiny's Child make the top 100 as do more established songs from The Beach Boys, Michael Jackson and Simon and Garfunkel.

BBC: Queen rock on in poll