What the Pregnancy Blood Test Levels Indicate?

pregnancy blood test levels

During pregnancy, your body produces Human chorionic gonadotropin or hCG hormones. It is made by cells that form in the placenta, which nourishes the egg after being fertilized and attached to the uterine wall.

The first level can be detected approximately 12-14 days after conception with a urine test and approximately 11 days after conception with pregnancy blood test levels. Normally, every 72 hours, hCG levels will double. This rate will peak at 8-11 weeks of early pregnancy and will fall for the rest of pregnancy.

1. Information On Normal Pregnancy HCG Values

You will get negative pregnancy blood test results or it means you are not pregnant if the blood hCG is under 5 mIU/ml. And, you may be pregnant or not if the blood hCG is between 5-25 mIU/ml. Repeat blood test for pregnancy within a few days. Then, you are pregnant if the blood HCG is over than 25 mIU/ml.

Several blood tests during pregnancy will provide a more accurate situation assessment while one single hCG reading is not enough to make a clear diagnosis. The blood hCG levels have numbers can vary so much so that it should not be used for the date of pregnancy. For postmenopausal women, hCG levels of up to 14 mIU/ml are still considered normal.

2. Guideline To hCG Levels During Pregnancy hCG levels in weeks from LMP or gestational age:

3 weeks LMP is 5 up to 50 mIU / mL
4 weeks LMP is 5 up to 426 mIU / mL
5 weeks LMP is 18 up to 7,340 mIU / mL
6 weeks LMP is 1,080 up to 56,500 mIU / mL
7 – 8 weeks LMP is 7, 650 up to 229,000 mIU / mL
9 – 12 weeks LMP is 25,700 up to 288,000 mIU / mL
13 – 16 weeks LMP is 13,300 up to 254,000 mIU / mL
17 – 24 weeks LMP is 4,060 up to 165,400 mIU / mL
25 – 40 weeks LMP is 3,640 up to 117,000 mIU / mL
Non-pregnant females is 0 up to 5 mIU / mL
Postmenopausal females is 0 up to 8 mIU / mL

hCG levels of each woman may increase differently. Therefore, these numbers are just a guideline.

3. What Can A Low HCG Level Mean?

pregnancy blood test levels

A low pregnancy blood test levels mean some things should be rechecked within 48-72 hours to see how the levels change. Low levels of hCG may indicate a possible miscarriage or blighted ovum, miscalculation of pregnancy dating, and ectopic pregnancy.

4. Increase of hCG in early pregnancy

There are no “normal” pregnancy blood test levels in early pregnancy and hCG usually doubles every 48 to 72 hours in early pregnancy. The minimum increase of 35% hCG over 48 hours is proposed as a minimum increase consistent with a normal pregnancy. This was reported by Siebert et al in 2006 and Morse confirmed this in 2012. Therefore, it is wrong to always assume a nonviable pregnancy even if there is an increase in hCG under 50% over 48 hours during the first 4 weeks of pregnancy.

5. What The hCG Pregnancy Test Is About

You actually test for the presence of hCG when you take a free pregnancy blood test or a home urine test. Pregnancy blood test will be positive if hCG is present. That means you are pregnant unless there is a false positive pregnancy test. As the pregnancy progresses, there is a very wide range of normal hCG values. And, it is not possible to determine just from a blood test whether pregnancy blood test levels are normal or not because the hCG values in the blood usually fluctuates a lot.

The amount of hCG in your blood can provide some information about your baby’s health and pregnancy. Pregnancy blood test levels may indicate the following. You may experience a risk of miscarriage or loss of pregnancy (miscarriage).

The presence of multiple pregnancies, such as twins and triplets and hCG levels are usually much higher when there is more than one fetus. There is a problem with development or growth of implant. There is an ectopic pregnancy in which the fertilized egg is implanted in the fallopian tube. In addition, there is the growth of abnormal tissue in the uterus or ovary, including some types of cancer in women who are not pregnant.

Actually, pregnancy blood test levels do not provide any diagnosis. They just tell that there is a problem to look into. Talk to your doctor or health care professional if you have concerns about your hCG levels, or want to know more. Know also the blood test detect pregnancy to consider whether you should take it or not.