Human Chorionic Gonadotropin
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Chorionic gonadotropin, pregnancy test, HCG, hCG, α-HCG, β-subunit HCG.
To assist in verification of pregnancy, screen for neural tube defects, and evaluate human chorionic gonadotropin (HCG)–secreting tumors
Serum collected in a gold-, red-, or red/gray-top tube. Plasma collected in a green-top (heparin) tube is also acceptable.
|Conventional Units||SI Units (Conventional Units × 1)|
|Males and nonpregnant females||Less than 5 milli international units/mL||Less than 5 international units/L|
|Pregnant females by week of gestation:|
|Less than 1 wk||5–50 milli international units/mL||5–50 international units/L|
|2 wk||5–100 milli international units/mL||5–100 international units/L|
|3 wk||200–3,000 milli international units/mL||200–3,000 international units/L|
|4 wk||10,000–80,000 milli international units/mL||10,000–80,000 international units/L|
|5–12 wk||10,000–200,000 milli international units/mL||10,000–200,000 international units/L|
|13–24 wk||5,000–80,000 milli international units/mL||5,000–80,000 international units/L|
|26–28 wk||3,000–15,000 milli international units/mL||3,000–15,000 international units/L|