Oct. 17, 2010 -- Women aged 65 and older are advised to undergo bone mineral density (BMD) screening every two years, but those with normal results at age 67 may be able to wait 10 years before their next screening test, a new study suggests.e adjust timing based on their first bone density test, and if it's very low, it's reasonable to do another next year and if it is just low, then five years is a reasonable amount of time to wait, she says.