Recent changes for Testosterone (Sendaway Test)
Note: For retrospective test requests;
Serum stable for up to 7 days at either 2-8C or frozen (-20C or colder).
Avoid more than one freeze/thaw cycle.
Source- Abbott 2nd Gen Testosterone (REF 2P13, Nov 2012)
Adult Males: 8.0 - 30.0 nmol/L
Adult Females: 0.4 - 2.0 nmol/L
New assay and Reference Interval from 20/6/2013.
Note: Male Reference Interval Revised by Abbott late 2013
Studies show testosterone levels in women falling with age. This process starts before the menopause and continues further after the menopause (Yeap et al. JCEM 97: 408-415, 2012). In healthy older men testosterone levels also drop mildly with age (Yeap et al. JCEM 97: 4030-4039, 2012).