7 weeks hcg normal reference range

After a woman becomes pregnant, the hormones in her body will change. The diagnosis of a woman's pregnancy is also made by testing the HCG value in her blood. The HCG value will also change significantly to determine whether the fertilized egg develops normally after pregnancy. What is the normal reference range of hCG in women at 7 weeks of pregnancy? The HCG level in the blood at 7 weeks of pregnancy is around 15000-200000 IU/L. Let's take a detailed look at the changes in HCG during pregnancy.

1. Normal hcg value at 7 weeks of pregnancy

The hCG blood test determines whether a woman is pregnant by measuring the hCG level in her blood. The hcg blood pregnancy test can detect pregnancy earlier and more accurately. Generally speaking, urine hCG tests such as early pregnancy test strips can usually only be performed one week after the menstrual period has ended, while blood hCG early pregnancy tests can often be performed one or two days after the menstrual period has ended. This can advance the time of confirming pregnancy, so that appropriate countermeasures can be taken earlier for the pregnancy.

The blood hCG test refers to human chorionic gonadotropin. The early pregnancy test strip mainly detects the hCG hormone in the urine. Generally, the syncytial trophoblast secretes an increase in the hCG hormone in the urine 6 days after conception. The best time to do a blood hcg test is 8-10 days after intercourse. At this time, the blood contains a higher hcg value and the test is more accurate.

Under normal circumstances, the normal value of blood hcg is <10 μg/L. Generally, the blood hcg of non-pregnant women is normal within the range of 0-10μg/L.

The absolute value of blood hCG varies greatly at different stages of pregnancy and between pregnant women, but the hCG values ​​between different pregnant women in the same pregnancy period may be different. Therefore, the hCG value can only be used to distinguish the pregnancy time based on its own changes. Generally, the blood hcg level of non-pregnant women is <100μg/L. During the first three months of pregnancy, HCG levels of 2.2±0.5 approximately double every day.

Urine-hcg (HCG semi-quantitative method): non-pregnant women <25μg/L, 40 days of pregnancy >5000μg/L, 60-70 days of pregnancy >(8-32)×104μg/L (urine HCG level is highest in the early morning, close to serum level).

Reference for blood hcg levels during normal pregnancy:

HCG (IU/L) in weeks of pregnancy

0.2-1 week 5-50

1-2 weeks 50-500

2-3 weeks 100-5000

3-4 weeks 500-10000

4-5 weeks 1000-50000

5-6 weeks 10,000-100,000

6-8 weeks 15,000-200,000

February-March 10,000-100,000

2. Normal value of hcg for ectopic pregnancy

Ectopic pregnancy is an abnormal pregnancy in which the fertilized egg develops outside the uterine cavity. It can cause acute bleeding. If not treated in time, it can cause the patient to go into shock, or even die in severe cases. The determination of hcg is currently an important method for early diagnosis of ectopic pregnancy.

HCG is a specific hormone secreted during pregnancy, so early diagnosis of ectopic pregnancy can be determined by testing blood hCG. Under normal pregnancy conditions, the amount of hCG secreted by the villi is very large, and the daily titer will continue to rise rapidly, increasing by more than 66% every 48 hours. However, in the case of ectopic pregnancy, due to the thin muscle layer of the fallopian tube and poor blood supply, the secretion of hCG is very low. The daily appreciation is small, usually less than 50% in 48 hours. (But for some people the initial HCG rise is normal). If the increase in β-HCG is greater than 66% every two days, it can be diagnosed as an intrauterine pregnancy; if the increase is less than 66%, there is a high possibility of ectopic pregnancy or intrauterine pregnancy hypoplasia. After a woman becomes pregnant, an increase in β-HCG can be detected in her blood from the 9th to 11th day, and the amount of β-HCG can double every two days thereafter (even if there is threatened miscarriage, the increase rate of hCG will not change). For example, if today's value is 234, if the test result the day after tomorrow is around 450, it can be considered as normal intrauterine pregnancy. If hcg is difficult to confirm, blood progesterone can be used for auxiliary diagnosis. It is well recognized that patients with ectopic pregnancy have low blood progesterone levels. Therefore, it can be used as one of the early diagnosis methods.

So what is the normal hCG value for ectopic pregnancy? It is difficult to have an exact number for the normal hCG value for ectopic pregnancy. We can only distinguish it based on the comparison of different data. HCG examination can be used to differentiate abdominal pain caused by ectopic pregnancy from other acute abdominal diseases. For example, in the case of ectopic pregnancy, the positive rate of HCG detection is only 60%, and HCG may still be positive 3 days after uterine bleeding.