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Hcg Level

Hcg Level

What is HCG?.

HCG, or human chorionic gonadotropin, is one of the major pregnancy hormones. Once implantation occurs, the placenta begins to form and secrete HCG. HCG levels rise and send a signal to the corpus luteum to keep producing progesterone, which in turn maintains the uterine lining (instead of shedding it and getting your period) and supports the developing embryo. For this reason, this HCG signal is sometimes called the “rescue of the corpus luteum.”

What’s a normal HCG rising pattern?

After implantation occurs, HCG levels will double approximately every 48-72 hours. HCG levels will peak within the first 8-11 weeks of pregnancy, and then will begin dropping off from there and plateau for the remainder of pregnancy [1.https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4584104/].

It’s important to know that the actual value of HCG levels isn’t as important as the pattern of HCG levels doubling every 48-72 hours. If you’ve experienced recurrent miscarriages or are a high-risk pregnancy, then your doctor may recommend a serial beta HCG test by testing your blood several times for HCG levels to see how quickly this hormone is being produced. However, unless there are signs of potential problems, HCG levels won’t be regularly checked after confirming you’re pregnant.

Confirming pregnancy

After you conceive (when the sperm fertilises the egg), the developing placenta begins to produce and release HCG.

It takes about 2 weeks for your HCG levels to be high enough to be detected in your urine using a home pregnancy test.

A positive home test result is almost certainly correct, but a negative result is less reliable.

If you do a pregnancy test on the first day of your missed period, and it’s negative, wait about a week. If you still think you might be pregnant, do the test again or see your doctor.

When Do HCG Levels Stop Doubling?

It's important to note that HCG doubling time can be an important tool in early pregnancy, but as pregnancy progresses, doubling time slows down.

By six to seven weeks gestation (or when your level passes 1,200 mIU/ml) doubling time decreases to roughly every three days, and after the level reaches around 6,000 mIU/ml, doubling time occurs every four days.

By the time you reach eight to 11 weeks, your HCG level will have reached its peak.

Where does HCG come from?

HCG comes from the placenta and enters the blood soon after implantation and is detected via pregnancy tests. HCG starts to be produced by the placenta as soon as implantation occurs. This happens about one week after fertilization and ovulation when the embryo implants and the placenta attaches to the uterine lining.

What is an HCG test?

Human chorionic gonadotropin (HCG) is a hormone produced by your placenta once an embryo implants in the uterus.

The purpose of the hormone is to tell your body to continue to produce progesterone, which prevents menstruation from occurring. This protects the endometrial uterine lining and your pregnancy.

A pregnancy test can detect HCG in your urine if your levels are high enough. This is how the test identifies that you are pregnant. But only a blood test can give you a precise numerical HCG reading.

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