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Androstenedione, LC/MS
This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).Androstenedione (also known as 4-androstenedione and δ4-androstenedione) is a 19-carbon steroid horm...
View Lab TestFree Androgen Index (FAI / Testosterone:SHBG Ratio)
The free androgen index can be used to estimate physiologically active testosterone.In most men and women, >50% of total circulating testosterone is bound to sex hormone-binding globulin, SHBG, and most of the rest is bound to albumin.1-3 SHBG-bound testosterone is not...
View Lab TestRed Blood Cell (RBC) Antigen Typing
Typing paternal RBCs for antigens that correspond to maternal antibody may aid in the prediction of hemolytic disease of the fetus and newborn.Presence of potent cold autoagglutinins, positive direct antiglobulin test, and, in some cases, bacteremia may interfere with test inte...
View Lab TestTestosterone, Free and Weakly Bound
Free and weakly bound testosterone (FWBT), also referred to as bioavailable testosterone, is thought to reflect an individual's biologically active, circulating testosterone. FWBT includes free testosterone and testosterone that is bound to albumin. FWBT does not include se...
View Lab TestTestosterone, Free and Weakly Bound, With Total Testosterone, LC/MS-MS
Free and weakly bound testosterone (FWBT), also referred to as bioavailable testosterone, is thought to reflect an individual's biologically active, circulating testosterone. FWBT includes free testosterone and testosterone that is bound to albumin. FWBT does not include sex horm...
View Lab TestTestosterone, Free, Direct, EIA
Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states where the testosterone binding proteins may be altered (obesity, cirrhosis, thyroid disorders).A pediatric reference interval has not been established for this analyte. Gross lipemi...
View Lab TestTestosterone, Free, Direct With Total Testosterone
Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states where the testosterone binding proteins may be altered (obesity, cirrhosis, thyroid disorders). See individual test descriptions for more information.A pediatric reference interval...
View Lab TestTestosterone, Free, Equilibrium Ultrafiltration With Total Testosterone
Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states where the testosterone binding proteins may be altered (obesity, cirrhosis, thyroid disorders).The concentration of free testosterone is very low, typically <2% of the tota...
View Lab TestTestosterone Free, Profile I
Free testosterone is the concentration of unbound testosterone in serum.1 The majority (approximately 60% to 90%) of serum total testosterone is associated with sex hormone binding globulin (SHBG); this fraction is tightly bound and biologically unavailable to its target ti...
View Lab TestTestosterone Free, Profile II
Free testosterone is the concentration of unbound testosterone in serum.1 The majority (approximately 60% to 90%) of serum total testosterone is associated with sex hormone binding globulin (SHBG); this fraction is tightly bound and biologically unavailable to its target ti...
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