Synonym/Acronym:
N/A
Rationale
To evaluate testosterone to assist in identification of disorders related to early puberty, late puberty, and infertility while assessing gonadal and adrenal function.
Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.
Normal Findings
Method: HPLC/tandem MS for total testosterone and equilibrium dialysis for free testosterone.
| Age | Conventional Units | SI Units (Conventional Units × 0.0347) | |||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 14–15 yr | |||||||||||||||||||||||||||||||||||||||||
| Male | 33–585 ng/dL | 1.14–20.29 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Female | Less than 75 ng/dL | Less than 2.6 nmol/L | |||||||||||||||||||||||||||||||||||||||
| 16–17 yr | |||||||||||||||||||||||||||||||||||||||||
| Male | 185-886 ng/dL | 6.42–30.74 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Female | Less than 20–75 ng/dL | Less than 0.69–2.6 nmol/L | |||||||||||||||||||||||||||||||||||||||
| 18–39 yr | |||||||||||||||||||||||||||||||||||||||||
| Male | 300–1,080 ng/dL | 10.41–37.48 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Female | 8–60 ng/dL | 0.28–2.08 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Adult | |||||||||||||||||||||||||||||||||||||||||
| Male | 300–890 ng/dL | 10.41–30.88 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Female | 10–60 ng/dL | 0.35–2.08 nmol/L | |||||||||||||||||||||||||||||||||||||||
| Older adult | |||||||||||||||||||||||||||||||||||||||||
| Male | 300–720 ng/dL | 10.41–24.98 | |||||||||||||||||||||||||||||||||||||||
| Female | 5–32 ng/dL | 0.17–1.11 | |||||||||||||||||||||||||||||||||||||||
| Postmenopausal levels are about half the normal adult level for females; levels in women who are pregnant are three to four times the normal adult level for females who are not pregnant. | |||||||||||||||||||||||||||||||||||||||||
| Age | Conventional Units | SI Units (Conventional Units × 3.47) |
|---|---|---|
| 14–15 yr | ||
| Male | 4–140 pg/mL | 13.88–486 pmol/L |
| Female | Less than 10 pg/mL | Less than 34.7 pmol/L |
| 16–17 yr | ||
| Male | 38–173 pg/mL | 132–600 pmol/L |
| Female | Less than 10 pg/mL | Less than 34.7 pmol/L |
| Adult | ||
| Male | 50–244 pg/mL | 173.5–846.68 pmol/L |
| Female | Less than 10 pg/mL | Less than 34.7 pmol/L |
| Postmenopausal | Less than 10 pg/mL | Less than 34.7 pmol/L |
| Older adult | ||
| Male | 5–75 pg/mL | 17.35–260.25 pmol/L |
| Female | Less than 10 pg/mL | Less than 34.7 pmol/L |
Critical Findings and Potential Interventions
N/A
There's more to see -- the rest of this topic is available only to subscribers.