3. HCG detection time
Generally, HCG will appear in the urine a few days after pregnancy. However, due to the small amount in the initial stage, it is not easy to detect, and it will be gradually obvious until 10-14 days later. Blood tests are more accurate than urinals, and a woman's blood level of HCG increases from day 9-11 after conception and doubles every two days thereafter. In the first 8 weeks of gestation the growth is rapid to maintain the pregnancy. After about 8 weeks of gestation, HCG gradually declines until it reaches a relatively stable level at about 20 weeks.
4. HCG normal table
Determination of the time of the specimen of the old unit of normal old → new coefficient legal unit of normal new → old coefficient
Non-pregnant blood <3.1mIU/ml 1 <3.1U/L 1
>5.0mIU/ml 1 >5.0U/L 1
Blood >100mIU/ml 1 >100U/L 1 at 30 days of gestation
Blood >2000mIU/ml 1 >2000U/L 1 at 40 days gestation
Blood at 10 weeks of gestation 50 ~ 100IU/ml 1 50 ~ 100kU/L 1
Gestational week blood 10 ~ 20IU/ml 1 10 ~ 20kU/L 1
Trophoblastic disease blood >100IU/ml 1 >100kU/L 1
5. Test the significance of HCG
1. Diagnosis of early pregnancy
2. Determine ectopic pregnancy, abortion and placental function
3. Diagnosis of trophoblast tumor