bioavailable testosterone

Increases

females:

• polycystic ovary syndrome (female)

Decreases

males

• hypogonadism
• orchidectomy
• estrogen therapy
• Klinefelter's syndrome
• hypopituitarism
• testicular feminization
• hepatic cirrhosis
• andropause*
• levels drop in men with children

* 40% of men > 45 years of age

Methods

• bioavailable testosterone measures free plus albumin-bound testosterone

Specimen

• serum (red top); separate serum; store frozen

Procedure

• ammonium sulfate is used to precipitate albumin

More general terms

• special chemistry test

Additional terms

• free testosterone
• testosterone (Delatestryl Testopel, Striant, Intrinsa, Xyosted)
• testosterone in serum