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Normal Hcg Levels At 6 Weeks

normal hcg levels at 6 weeks

How Physicians Interpret hCG Results

It is important to note that any single hCG test in early pregnancy does not tell much about the health of a pregnancy or fetus because individual women have a wide variation in hCG levels, and even one woman may experience wide variation in hCG numbers from one pregnancy to the next. rather, physicians look at the trend in the number among two or more tests. The hCG doubling time, over two separate blood tests spread over a period of days, usually provides more useful information than a single hCG level when evaluating a pregnancy. In most cases, the number will double over a period of 48 to 72 hours.

Typical hCG Results

While there is a wide variation in hCG levels, the American Pregnancy Association cites ranges of hCG typical of most pregnancies, based on the number of weeks from the woman’s last menstrual period.

  • 3 weeks: 5 - 50 mIU/ml
  • 4 weeks: 5 - 426 mIU/ml
  • 5 weeks: 18 - 7,340 mIU/ml
  • 6 weeks: 1,080 - 56,500 mIU/ml
  • 7 - 8 weeks: 7, 650 - 229,000 mIU/ml
  • 9 - 12 weeks: 25,700 - 288,000 mIU/ml
  • 13 - 16 weeks: 13,300 - 254,000 mIU/ml
  • 17 - 24 weeks: 4,060 - 165,400 mIU/ml
  • 25 - 40 weeks: 3,640 - 117,000 mIU/ml
  • Non-pregnant women: <5.0 mIU/ml
  • Postmenopausal women: <9.5 mIU/ml

When hCG Results Can Signal a Problem

In instances where a first hCG measurement is lower than expected, or when there is cause to worry about miscarriage due to previous loss or other symptoms, a second test will most likely be ordered. When there is a decline in the level of hCG from the first test to the second test, this often means a miscarriage may take place, also known as impending miscarriage. If you are concerned about your hCG levels, you should direct your questions to your physician and try not to read too much into any single measurement.

Causes of low hCG levels

If your hCG levels fall below the normal range, it’s not necessarily a cause for concern. Many women have gone on to have healthy pregnancies and babies with low hCG levels. Most women don’t ever have cause to find out what their hCG levels are specifically.

Normal hCG Values In Pregnancy

  • Blood hCG under 5 mIU/ml: Negative. Not pregnant
  • Blood hCG between 5-25 mIU/ml: "Equivocal". Maybe pregnant maybe not. Repeat test in a couple of days
  • Blood hCG over 25 mIU/ml: You are pregnant!
  • One single hCG reading is not enough to make a clear diagnosis. Several hCG tests days apart give a more accurate assessment of the situation.
  • The blood hCG levels should not be used to date a pregnancy since these numbers can vary so widely.

Implantation occurs on average 9 days after ovulation (range 6-12 days) or about 5 days before a missed period. hCG levels are detected in the blood as early as 2-3 days, and in the urine 3-4 days, after implantation. A urine pregnancy test would be expected to be positive around the time of a missed period or 14-15 days after implantation (which can be as early as several days before a missed period).

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