http://articles.mercola.com/sites/articles/archive/2008/01/02/thyroid-screening-part-two.aspxWhile overt hyper- or hypothyroidism are easily diagnosed by physicians, the illness can be less apparent in its early or "subclinical" stages. Women over 50 years of age should be screened once every 5 years for thyroid disorders, accordingenCommunityServer 2008.5 SP1 (Build: 31106.3070)