Imperial Collage Healthcare

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Human chorionic gonadotrophin (hCG) (pregnancy)


Lab Code : HCG


Test Background
The role of hCG in pregnancy is to prevent luteolysis and maintain progesterone synthesis. Early pregnancy testing is based on the detection or measurement of hCG in urine (pregnancy test) or serum. It increases rapidly during the first few weeks and peaks at about 10 weeks. A doubling time of ≥ 7 days has a very high predictive value for ectopic pregnancy.


Clinical Indications
Detection of pregnancy (in this context urine testing is the preferred method of assessment) Suspected pregnancy (oligomenorrhoea, hyperprolactinaemia, etc.) Diagnosis of ectopic pregnancy Diagnosis and monitoring of miscarriage


Reference Range
Blood: <5 IU/L


Sample Required
SST (gold top)


Sample Volume
0.5 mL


Turnaround Time
1 day


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