This pregnancy blood test includes:
Our pregnancy blood test determines if you are pregnant by confirming the presence of hCG (human chorionic goadotropin) in your blood. This pregnancy hormone is produced by the placenta and increases steadily through the first trimester (8-10 weeks) of a pregnancy.
The qualitative pregnancy test only detects if hCG is present in your blood sample indicating a positive pregnancy. hCG appears in the blood of a pregnant woman as early as 10 days after conception.
Quantitative hCG measurement assists in determining the exact age of the fetus. It is also used to help with the diagnosis of abnormal pregnancies, such as ectopic pregnancies, molar pregnancies, and possible miscarriages. It may also be used as part of a screening test of Down syndrome.
Pregnancy blood test results are given in milli-international units per milliliter (mUI/mL).
Normal levels are found in:
Non-pregnant women: less than 5 mIU/mL
Healthy men: less than 2 mIU/mL
In pregnancy, HCG level rises rapidly during the first trimester and then declines slightly. The expected HCG ranges in pregnant women are based on the length of the pregnancy.
3 weeks: 5 – 72 mIU/mL
4 weeks: 10 -708 mIU/mL
5 weeks: 217 – 8,245 mIU/mL
6 weeks: 152 – 32,177 mIU/mL
7 weeks: 4,059 – 153,767 mIU/mL
8 weeks: 31,366 – 149,094 mIU/mL
9 weeks: 59,109 – 135,901 mIU/mL
10 weeks: 44,186 – 170,409 mIU/mL
12 weeks: 27,107 – 201,165 mIU/mL
14 weeks: 24,302 – 93,646 mIU/mL
15 weeks: 12,540 – 69,747 mIU/mL
16 weeks: 8,904 – 55,332 mIU/mL
17 weeks: 8,240 – 51,793 mIU/mL
18 weeks: 9,649 – 55,271 mIU/mL
Higher than normal level may indicate:
More than one fetus, for example, twins or triplets
Choriocarcinoma of the uterus
Hydatidiform mole of the uterus
Testicular cancer (in men)
During pregnancy, lower than normal levels based on the gestational age may indicate:
Threatened spontaneous abortion (miscarriage)
– Testing information –
No fasting or special preperation is needed for a pregnancy blood test.