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hCG Values in Pregnancy

Human Chorionic Gonadotropin Chart

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Updated April 13, 2012

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Embryo in early pregnancy

Early in pregnancy, your body begins to secret hCG.

Photo © A.D.A.M.
Pregnancy tests look for hCG (human chorionic gonadotropin) which is excreted in pregnancy. You can detect hCG in either blood or urine pregnancy tests. Which type of pregnancy test your doctor or midwife requests will depend on what they are looking for with your pregnancy.

If it is merely to confirm that you are pregnant, a urine pregnancy tests or home pregnancy test will suffice. If your practitioner has a reason to suspect multiple pregnancy, ectopic pregnancy or a miscarriage, a blood pregnancy test is more often used. Sometimes you will have these blood tests repeated to watch for a rise in the hCG levels. The rate of rise for hCG in pregnancy is that it nearly doubles about every 48 hours, though this can vary and does level off after the second trimester.

See Chart Below

Sources

Obstetrics: Normal and Problem Pregnancies. Gabbe, S, Niebyl, J, Simpson, JL. Fifth Edition.
Understanding Diagnostic Tests in the Childbearing Year. Frye, A. 6th edition.

hCG Values in Pregnancy

From Conception From LMP mIU/ML or IU/L
7 days 3 Weeks 0 - 5
14 days 28 days 3 to 426
21 days 35 days 18 to 7,340
28 days 42 days 1080 to 56,500
35 - 42 days 49 - 56 days 7,650 to 229,000
43 - 64 days 57 - 78 days 25,700 to 288,000
57 - 78 days 79 - 100 days 13,300 to 253,000
17-24 weeks 2nd Trimester 4060 to 65,400
25 weeks - birth 3rd Trimester 3640 to 117,000
Several Days After Baby - < 5
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