Your doctor says everything looks fine, but you still feel terrible. The problem might not be your health but how labs define “normal.” Understanding the difference between normal and optimal could ...

Laboratory testing supports most clinical decision-making; however, the concept of a fixed “normal” value is theoretical. Studies have suggested that approximately 7 out of 10 clinical decisions rely ...

Please provide your email address to receive an email when new articles are posted on . Reference ranges for thyroid function among adolescents differ substantially from those for adults, according to ...

A large study of more than 9,000 men has established harmonized reference ranges for total testosterone in men that when applied to assays that have been appropriately calibrated will effectively ...

The findings of this study provide contemporary autopsy reference ranges for infant organs, by age, during the first year of life. This data is based on a large number of cases (over 1,000 infant ...

A large study of more than 9,000 men has established harmonized reference ranges for total testosterone in men that when applied to assays that have been appropriately calibrated will effectively ...

Please provide your email address to receive an email when new articles are posted on . Polygenic score was a stronger predictor of TSH levels than free T 4 in two study cohorts. Using polygenic score ...

The sex of an individual is typically assigned at birth based on the appearance of the external genitalia. Chromosomal testing can determine whether a person is biologically male (1 X chromosome and 1 ...