Pregnant women have been advised to maintain a varied diet during their pregnancy.
Judy Ledger, chief executive of Baby Lifeline, said that women should "eat sensibly" while carrying a child and make sure that there is "lots of fibre, vegetables [and] vitamins" in their diet.
The comments follow research from the Royal College of Midwives and Netmums, which found that 70 per cent of women 'ate for two' during pregnancy.
"To 'eat for two' is rubbish, it's nonsense," Ms Ledger commented.
"The baby will take the nourishment from the mother in any case. All it does is lead to all sorts of problems.
"It's a strain on the heart, on the mother, and the cardio-vascular system as a whole."
She advised women that sticking to a sensible weight during pregnancy needn't be difficult.
A "completely varied diet" and some "gentle exercise like walking and keeping active also helps".
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