Laboratory reference ranges vary depending on the sex (gender) of the patient. Spectrum Health Laboratory’s policy is to report reference ranges for a result based on the sex the ordering provider provided on the order, or given to our staff via the patient’s ID. This will require extra care when interpreting results for patients who are transgender. Some reference ranges may change as a patient transitions between genders, while others may not. Please always evaluate results based on the reported sex and reference in light of your patient’s gender role.