The health watchdog NICE says women between the ages of 40 and 42 should be offered IVF on the NHS in England and Wales if they are having fertility problems. Previously, NICE did not recommend IVF for women older than 39.
NICE says is has been able to change its guidance because of a number of key medical advances.
The guidance does not apply to Northern Ireland or Scotland.
The guidelines by the government's health advisory board, NICE, mean more couples are eligible for treatment.
Today's fertility treatment guidelines offer hope to couples unable to conceive, but they need to be properly implemented, across the NHS.