Eating avocados and dressing salads with olive oil could help women trying to have a baby through IVF, researchers claim.

Foods typically eaten as part of the Mediterranean diet may triple the chances of success for women having the fertility treatment.

A study found monounsaturated fat – found in olive oil, sunflower oil, nuts and seeds – was better than any other kind of dietary fat for would-be mothers. Those who ate the highest amounts were 3.4 times more likely to have a child after IVF than those who ate the lowest amounts.