What is the reason of low blood hcg? If the hcg value in the serum of early pregnant women is very low or the continuous monitoring shows a downward trend, there is a precursor to abortion. If the HCG value in the blood is too low, embryonic dysplasia cannot be ruled out, and drugs such as human chorionic gonadotropin can be used according to the doctor's advice. If the serum hcg value of pregnant women after induced abortion is still significantly higher than the normal value or shows an upward trend, it is the result of incomplete operation. For patients who have ruled out pregnancy, it is very helpful to detect abnormal pregnancy diseases, such as hydatidiform mole and choriocarcinoma.
Generally, the low hcg value is due to the influence of environmental climate change, mental and psychological fluctuations, drugs and other factors on female menstrual cramps. Therefore, it is normal for women to postpone menstruation once in a while, and it is abnormal to postpone menstruation for more than 7 days for three consecutive cycles. It is impossible to accurately judge whether a woman is pregnant only based on the delay of menstruation. The detection of hcg in blood is an index to judge whether a woman is pregnant.
In fact, due to the low hcg value, it is normal to delay menstruation occasionally. Most of them are caused by diet or colds, not necessarily pregnancy. Women should take good care of themselves during the physiological period. In addition, it is best for pregnant women to judge whether they are pregnant by measuring hcg value.
The examination standard of blood hcg varies from hospital to hospital. If the reference value of the blood hcg test sheet you get is ng/ml, it should be converted into nmol/L by X3. 18. Please pay attention to the unit. The following are the reference values in nanomole/liter:
Reference value of progesterone: 7 weeks pregnant: 52.7- 100. 1 nmol/L, 8 weeks pregnant: 64.6- 13.8 nmol/L, 9- 12 weeks pregnant: 78-/kloc-0. 13- 16 weeks: 98.3- 185.7 nmol/L, 17-20 weeks:153.8-241.2 nmol/l,
Reference value of hcg: pregnancy: 3-4 weeks: 9- 130(MIU/ ml). 4-5 weeks of pregnancy: 75-2600, 5-6 weeks of pregnancy: 850-208003, 6-7 weeks of pregnancy: 4000- 100200, 7- 12 weeks of pregnancy:11. 5438+06-29 weeks: 1400-53000 pregnant 29-4 1 week: 940-60000.
HCG and progesterone are inconsistent, and progesterone has been rising. However, serum HCG increased rapidly in the first trimester of pregnancy, doubled in about 1.7-2 days, reached its peak in 8- 10 weeks of pregnancy, and decreased rapidly after 12 weeks, and then maintained a certain level.
Generally speaking, the chorionic gonadotropin produced by fertilized eggs appears in the blood about 10 days after fertilization. If you have a blood HCG test about 10 days after sexual intercourse. Blood hcg test results can be obtained about 40 minutes after general examination. The quantitative examination of HCG value in blood is more sensitive and accurate than early pregnancy test paper, and you can know whether you are pregnant or not 10 days after sex.
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