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  The main function of human chorionic gonadotropin HCG is to stimulate the corpus luteum, which is conducive to the continuous secretion of estrogen and progestin, so as to promote the formation of uterine decidua and the growth and maturation of the placenta. Begin to secrete, 6 days after fertilization of HCG in 7 days after fertilization can measure in pregnant women serum and urine, can be used in the diagnosis of early pregnancy, and peak serum concentrations 8 ~ 10 weeks of gestation lasts 10 drops rapidly in the future, middle and late pregnancy blood concentration, when only 10% of the peak, continue to deliver, generally in 1 ~ 2 weeks postpartum.

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  How much is human chorionic gonadotropin pregnant?

  As long as the human chorionic gonadotropin is higher than the reference value given on the laboratory sheet, it can be interpreted as being pregnant. Different hospital assay method is different, so the reference value on the assay sheet is different, the reference value of some hospitals is 0-5, so human chorionic gonadotropin is greater than 5, it is pregnant. Some hospitals have a reference value of 0-25, so human chorionic gonadotropin greater than 25 is pregnant.

  Human chorionic gonadotropin enters the mother's blood after fertilization and proliferates rapidly until 8 weeks of gestation, then slowly decreases in concentration until 18 to 20 weeks, and then remains stable. Generally intact human chorionic gonadotropin levels are elevated to at least 2.

  It's mom that has to do with Down syndrome. In fact, the average level of complete human chorionic gonadotropin in the mother blood of DS patients was only 1. 3MoM, can not clearly identify DS patients. The human chorionic gonadotropin-related molecules used for DS examination were free B-HCG and hyperglycemic hCG(H-HCG).

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