BabyDataâ„¢.com: Your Personalized Pregnancy Site
QUANTITATIVE HCG AND PREGNANCY
Human Chorionic Gonadotropin (hCG)is the "pregnancy hormone" that keeps the corpus luteum producing progesterone when conception occurs. It can be detected in the urine and in the blood.
The Home Pregnancy Tests (HPTs) measures the urine HCG qualitatively, which mean results are either "positive" or "negative". In a pregnancy, it usually becomes positive around the time of the first missed period.
The Blood hCG test measures the HCG quantitatively, which means you get a number for the test. The blood hCG is much more sensitive than a urine HPT, and it can detect pregnancy as early as 10 days after fertilization.
Other than just finding the hCG, and diagnosing pregnancy, hCG is also often monitored over time for certain reasons.

Other facts about Postconception Monitoring of HCG:

  • Pregnant women usually attain serum concentrations of 10 to 50 mIU in the week following conception.
  • HCG monitoring is more useful before the fetal heart is seen (before 6 weeks after LMP), usefully to rule out ectopic pregnancy or an early miscarriage.
  • Usually, but not always,  hCG is expected to double every 2 days within the first 10 weeks
  • A maximum is usually reached by the 10th - 11th week, followed by a decrease in the second trimester
  • IMPORTANT: An increase of hCG without doubling does not necessarily indicate a problem
  • Once fetal activity has been detected by ultrasound in a normal patient population, chances of normal delivery are about 95%
  • Because the normal level of hCG can vary tremendously (see below), and once the fetal heart rate is seen, most doctors will monitor the fetal heart rate rather than drawing hCG,
 
wpe2.jpg (22867 bytes)
Week from the
Last  Menstrual Period (LMP)
HCG in mIU/ml
(from INCIID)
HCG in mIU/ml
(from Quest)

3 weeks

5 - 50 9-130
4 weeks 3 - 426 75-2,600
5 weeks 19 - 7,340 850-20,800
6 weeks 1,080 - 56,500 4,000-100,200
7 - 12 weeks 7,650 - 288,000 11,500-289,000
13 - 16 weeks 13,300 - 254,000 18,300-137,000
17 - 24 weeks 4,060 - 165,400 1,400-53,000
25 - 40 weeks 3,640 - 117,000 940-60,000
 
The numbers in this pregnancy beta chart are to be used only as a guideline and are not the final word on the status of your pregnancy. You should always discuss the results of your blood tests with your physician.
 
 

These values are from a group of 53 normal singleton pregnancies
Lab assays vary - do not rely too much on these values
Check with your physician about your own levels

NORMAL SINGLE PREGNANCIES

Day after HCG or LH

Day after LMP

Average
mIU/ml

High
mIU/ml

Low
mIU/ml

#

14

28

48

119

17

12

15

29

59

147

17

18

16

30

95

223

33

23

17

31

132

429

17

21

18

32

292

758

70

19

19

33

303

514

111

23

20

34

522

1690

135

13

21

35

1061

4130

324

12

22

36

1287

3279

185

22

23

37

2034

4660

506

13

24

38

2637

10000

540

16

The information in the table above is part of a study carried out by Dr. Sherbahn that compared HCG levels from single, twin and heterotopic (combined intrauterine and ectopic) pregnancies.