New research indicates a diet containing lots of monounsaturated fat - found in the fleshy green fruit, olive oil, as well as peanuts, almonds and cashews - can as much as triple the chance of success in women resorting to fertility treatment to conceive.
Specialists believe such a diet could help the majority of women wanting to get pregnant naturally as well.
By contrast eating lots of saturated fat, found in dairy products and red meat, appears to damage women's fertility. High saturated fat intake has already been linked to lower sperm counts.
Dr Jorge Chavarro and colleagues at the Harvard School of Public Health in the US, looked at how intake of different types of fats affected success of IVF treatment in 147 women, mostly in their 30s. They found the women who ate the most monounsaturated fat had up to three times the chance of giving birth via IVF as those who ate the least.