Scientists leading the trial at University College London believe the blood test could improve the accuracy of diagnosis of the disease to more than 90%.

Traditional, healthy diets are being replaced by ultra-processed foods, often high in sugar and additives, the UN agency says.

More than 14.1 million people experienced food insecurity last year, warns the Trussell Trust.

The draft guidance advises against many popular but unproven fertility add-ons offered by clinics.