United Nations Secretary General Ban Ki-moon has said the "UN will do everything in its power to overcome malnutrition."
He added: "We must empower women so they are well nourished before and during pregnancy so they can breast feed."
The UN chief was talking via video link at an international meeting in London with charities and companies, aimed at combating malnutrition in the developing world.
David Cameron is due to talk shortly.
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Outbreaks of rain and strengthening winds will affect southernmost parts of England and Wales today.
An earlier debate on the issue was suspended as an 'expression of support' following the Westminster terror attack.
Five people were killed and dozens more were injured after a car and knife attack in the capital on Wednesday afternoon.