Information about hCG Levels
The pregnancy hormone, called human chorionic gonadotropin (hCG) is first found in a pregnant woman's blood as early as 7 to 8 days after conception. Early pregnancy testing is generally based on the detection or measurement of hCG levels. Blood and urine tests made during your pregnancy are taken to measure the hCG levels.
hCG levels in Early Pregnancy
hCG levels in Early Pregnancy. The hormone hCG is made by the developing embryo soon after conception and later by part of the placenta. The purpose of hCG is to maintain progesterone production that is critical for a pregnancy in humans. As a pregnancy grows, hCG increases.
Chart of normal hCG levels
The serum test (blood test) uses 2-4 mL of venous blood for testing. The serum hCG levels are measured from the LMP (last menstrual period). The chart of normal hCG levels using the serum test (blood test) is as follows:
Chart of normal hCG levels |
| Non-pregnant women | Under 5.0 mIU/ml |
| 3 weeks since LMP | 5 - 50 mIU/ml |
| 4 weeks since LMP | 5 - 426 mIU/ml |
| 5 weeks since LMP | 18 - 7,340 mIU/ml |
| 6 weeks since LMP | 1,080 - 56,500 mIU/ml |
| 7 - 8 weeks since LMP | 7, 650 - 229,000 mIU/ml |
| 9 - 12 weeks since LMP | 25,700 - 288,000 mIU/ml |
| 13 - 16 weeks since LMP | 13,300 - 254,000 mIU/ml |
| 17 - 24 weeks since LMP | 4,060 - 165,400 mIU/ml |
| 25 - 40 weeks since LMP | 3,640 - 117,000 mIU/ml |
Chart of normal hCG levels |
Twins hCG levels - hCG levels for multiples
Twins hcg levels or hcg levels for multiples. The serum test (blood test) for testing hCG levels can help to confirm if you are going to have twins or multiples because you will have higher hCG levels with a twin or multiple pregnancy. However, hCG levels alone are not enough to guarantee that you are going to have twins or multiples. Checking for multiple heartbeats can confirm the presence of twins or multiples at 12 weeks of pregnancy when the Doppler test which distinguishes two or more heartbeats. An ultrasound scan can also reveal whether you are carrying twins or multiples.
