HCG levels in early pregnancy can be detected approximately 11 days after conception by a blood test, and about 12-14 days after conception by a home pregnancy test, or urine test. In general, the HCG levels in early pregnancy should double every 48 hours in early pregnancy to indicate a viable pregnancy. This rate will increase to every 96 hours after a few weeks.

Normal hCG levels during early pregnancy vary significantly from one person to another. HCG levels increase rapidly during the beginning of pregnancy, doubling approximately every two to three days, and then the doubling rate starts to slow down somewhere around the 8th week of pregnancy. A couple of days can have a significant effect on how high a woman's levels are.

If you get your hCG level back and they seem higher than normal for your gestation, there is a chance you are carrying twins or multiples. The problem with going by hCG level's alone to determine how many babies you are carrying is that some women (for whatever reason) have higher hCG levels when they are pregnant then other women do. You may have a level of 49 hCG at 4 weeks gestation, and your friend may have a level of 268 hCG at 4 weeks gestation.

If you have ever looked at an HCG (Human Chorionic Gonadotropin) chart, you will know that the range for a normal pregnancy at 4 weeks, 5 weeks, 6 weeks and so on is quite large. For example a woman who is 4 weeks pregnant, may have an hCG level of 45 or 345, and both are perfect. The biggest thing to remember when analyzing your hCG levels is are they rising, and how quickly? It isn't so much the number as it is how quickly the numbers are doubling.

The rate at which the foam number is doubled is what assumes prime significance in case of expectancy. Sometimes it can be noted that a healthy expectation can lead to inferior hormone level. It is a fact worth mentioning that the HCG level should slowly but surely decrease after child birth takes place. After miscarriage the level should in all possibility reach the extent that existed before fertilization. The time taken for the HCG level to reach a normal stage is about four to six weeks.

HCG stimulates the ovary to make progesterone. Progesterone is the hormone that maintains the endometrial lining of the uterus for carrying the pregnancy. In the normal menstrual cycle, progesterone made by the ovary only lasts for 2-weeks after ovulation. After 2-weeks, the progesterone level falls and menstruation begins. However, if pregnancy occurs, it stimulates the ovaries to produce progesterone to prevent menstrual bleeding.

Each month in the second half of a woman's menstrual cycle after an egg has been released by the ovary the lining of the uterus is supported and stimulated by progestin that is produced by the cells of the ovary in the area where the egg was released. This area of the ovary is called the corpus luteum, and it produces progestin for about 12-14 days. If the egg is fertilized and implants in the uterus, the developing embryo starts to produce the hormone HCG which stimulates the corpus luteum to continue to produce progesterone.

Home pregnancy tests are best if used after a woman misses her first period because the hormone takes time to build in the system. If a home pregnancy is taken too soon, the results can be inaccurate causing unneeded stress for the woman. There are home pregnancy tests specially designed to detect the HCG hormone at lower levels. These tests advertise that women can take the test as early as 7 days after they have ovulated. Keeping in mind these tests are more sensitive, the accuracy of the test may not be the same as tests that require a longer waiting period.

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