hCG, or human Chorionic Gonadotropin, is a hormone produced by the placenta during pregnancy. hCG interacts with the luteinizing hormone/choriogonadotropin receptor (LHCGR) of the ovary, and, through this process, stimulates the corpus luteum — the remains of an ovarian follicle that has already released an ovum. Thanks to this stimulation, corpus luteum produces the hormone progesterone until the moment the placenta is mature enough to begin and sustain progesterone synthesis by itself. Progesterone, in turn, has an influence on the uterus; it prevents it from contracting, and, furthermore, maintains the secretory uterine lining, providing a constant supply of the nutrients to the fetus. These effects ensure that pregnancy may develop physiologically without any problems.
The breastfeeding calorie calculator tells you how many calories you need to consume daily to keep yourself healthy during lactation.
Extremely high levels of hCG can indicate a multiple pregnancy (for example, twins). On the other hand, low hCG levels may indicate an ectopic pregnancy. This means that the fertilized egg has implanted in a place other than the uterus. When there is no visible fetus on a vaginal USG combined with a hCG of over 1500 mlU/ml, ectopic pregnancy is highly probable. Moreover, a lack of growth or a drop of hCG levels may suggest a miscarriage.
Apart from pregnancy, high hCG levels are characteristic of cancer of the ovaries or testicles. Both of these conditions cause this hormone to be released into the body.
You need to input the following three values into the hCG calculator:
Once you have provided our hCG levels calculator with these values, it will automatically calculate all of the remaining numbers.
As a rule, hCG levels increase only for the first 14–16 weeks of your pregnancy. After a peak in the fourteenth week, the hCG results begin to gradually drop. Soon after delivery, the hCG levels go back to their regular pre-pregnancy value.
The doubling times of hCG are very short at the beginning of pregnancy and the rate decreases as hCG level increases. You can expect the following doubling times:
Do you remember your due date? You can calculate it using our due date calculator.
Remember that the "regular" values provided below are just a guide, and are not equivalent to a doctor's consultation! In case of doubts, make sure to schedule an appointment! After the baby is born, doctors will assess it with another chart, called the APGAR scale. You can visit our APGAR score calculator to learn more on this topic.
Week of pregnancy
hCG levels in blood (mIU/ml)
Men and non-pregnant women
Up to 200,000
hCG is a very reliable marker to indicate that someone is pregnant. It can already be detected in the blood eight days after the fertilization of the egg, and ten days for urine. Although the hCG marker is very sensitive, you have to keep in mind that if the test occurs during these 8–10 days after the fertilization, it could give a falsely negative result. It means that, in spite of the presence of a developing pregnancy inside a woman's body, the pregnancy test may come back negative.
Hillel Shapiro and Harry Zwarenstein developed the first version of the hCG pregnancy test at the beginning of the 1930s. They discovered that injecting urine of a pregnant woman (which, as we already know, contains hCG) into a Xenopus toad caused the toad to ovulate. Needless to say, that before researchers fully understood the processes behind this phenomena, the poor Xenophus toads were massively exported and used as a pregnancy test.
The most popular hCG pregnancy test for at-home use is the one requiring a sample of the womans urine. A woman either has to urinate into a plastic cup and then place a small amount of urine on a testing stick using a dropper, or urinate directly on a testing stick, depending on the producer. It is crucial to carefully read the instruction included by the producer of the testing set before taking the test to assure its effectiveness. The result appears typically after several (5 to 10) minutes.
The advantage of a hCG blood tests is their ability to measuring the change of hCG concentration in time. This way, we can indirectly verify that the fetus is developing correctly, which is where our hCG levels calculator comes in handy.
The hCG diet is an example of someone making a false conclusion after clinical studies. The idea of adding hCG injections to a diet plan was created by Albert T. W. Simeons after his research on pregnant women in India. He reported that patients on a calorie-deficient diet lost mostly fat tissue and not muscle mass. Therefore, he designed a dietary protocol of low-dose daily hCG injections combined with extremely low calorie intake — less than 500 calories per day.
However, many later performed studies on the hCG diet did not find the same results. The effect of the weight loss can be attributed entirely to such a low supply of calories (it is recommended for a normal adult to consume around 2000–2500 calories per day), while hCG injections can lead to many undesired side effects including depression, irritability, fatigue, edemas, swelling of the men's breasts, and the formation of blood clots that can block blood vessels, potentially leading to heart attacks or strokes. The Food and Drug Administration (FDA) did not approve hCG for OTC (over-the-counter) use and obliged the producers of hCG medications to put a label on their products noting that hCG is not effective for weight loss.
You cannot calculate your hCG levels without the blood tests, so you cannot do it on your own at home. However, if you already have your results, you can calculate doubling time (DT) on your own. Use the following formula:
DT = T /(log2(hCG2/hCG1))
The only safe method to tell if your hCG levels are rising is getting a blood test. Symptoms such as nausea, bloating, spotting, or breast soreness can occur due to an increasing hCG level. Still, you can't use them to estimate the hCG level from day to day.
You can be between 4 and 8 weeks pregnant. To calculate your pregnancy progress with hCG levels, you can use the hCG levels chart.
While pregnant with twins, your hCG levels can be on the higher end of the standard hCG range. The levels shouldn't permanently exceed the range, though. It doesn't mean that high hCG levels always indicate twins – twins can only be confirmed with an ultrasound examination.
Addiction calculator tells you how much shorter your life would be if you were addicted to alcohol, cigarettes, cocaine, methamphetamine, methadone, or heroin.
Use this Bishop score calculator to know if the birth should begin soon and what are the chances of a successful delivery induction.