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Hcg Pregnancy Test

Hcg Pregnancy Test

What is the human chorionic gonadotropin (hCG) blood test?

The human chorionic gonadotropin (hCG) blood test measures the level of hCG hormone present in a sample of your blood.

hCG is produced during pregnancy. Your doctor may refer to the hCG blood test by another name, such as the:

  • beta-hCG blood test
  • quantitative blood pregnancy test
  • quantitative hCG blood test
  • quantitative serial beta-hCG test
  • repeat quantitative beta-hCG test

What is human chorionic gonadotropin (hCG)?

During pregnancy, cells in the developing placenta make hCG. The placenta is the sac that nourishes the egg after it’s fertilized and attaches to the uterine wall.

hCG can first be detected in a blood sample about 11 days after conception. Levels of hCG continue to double every 48 to 72 hours. They reach their peak around 8 to 11 weeks after conception.

hCG levels then decline and level off, remaining steady for the rest of the pregnancy.

How hcg is produced

Human chorionic gonadotropin is an important hormone necessary for the maintenance and development of gestation. It is produced by the trophoblast, the embryo’s cell group that gives origin to the placenta.

About six days after fertilization of the ovum by the sperm, the forming embryo reaches the wall of the uterus and lodges in it. From that moment on, the hCG hormone produced by the trophoblast can reach the mother’s bloodstream, which makes it possible to detect it by ultra-sensitive laboratory tests.

As the embryo and placenta develop, more hCG is produced and released into the mother’s circulatory system. In the first weeks of gestation, hCG levels double every 2 or 3 days. If the rate of increase of human chorionic gonadotrophin in the first 30 days of pregnancy is markedly low, there may be something wrong with pregnancy, such as non-viable fetus or ectopic pregnancy.

What are the uses of the hCG urine test?

The hCG urine test confirms pregnancy about one to two weeks after your missed period. This is a qualitative test, which means that it will tell you whether or not it detects the hCG hormone in your urine. It’s not intended to reveal specific levels of the hormone. The presence of hCG in your urine is considered a positive sign of pregnancy.

How do I prepare for the hCG urine test?

There are no special preparations necessary to take an hCG urine test. You can ensure the most accurate results with simple planning.

If you’re taking a home pregnancy test, you should do the following:

Carefully read the instructions included in your test kit before collecting your urine sample.

Make sure the test’s expiration date hasn’t passed.

Look for the manufacturer’s toll-free number on the package, and call it if you have any questions about using the test.

Use your first morning urine one to two weeks after your first missed period.

When does hcg become detectable?

Current techniques can only detect hCG from the 3rd or 4th weeks of pregnancy counted from the date of the last menstrual period.

Since the 4th week of pregnancy is usually the time at which the next menstruation should come, we always suggest that the patient wait for the menstruation not to show up for the test. In this way, we minimize the risk of false negative results.