HCG is 7 weeks pregnant, being in the norm, prevents rejection of the embryo, stimulates the production of steroids, and is responsible for the normal formation of the vital organs. If gonadotropin below or above the normal range, it indicates the ectopic implantation of the embryo, multiple or development of intrauterine fetal anomalies.
Dynamics of hormone levels during pregnancy
HCG levels are constantly changing during embryonic development. Gonadotropin has an immunosuppressive effect on a woman's body that there was no rejection of the ovum. At the same time it stimulates the synthesis of progesterone, maintaining the corpus luteum life, promotes the production of glucocorticoids in the embryo.
During pregnancy, there are the following changes in hormone concentrations:
- HCG increases steadily until it reaches the maximum possible level of serum on 9-13 week.
- After this period, the number of starts to decrease.
- From 23 to 41 weeks little change in hormone concentration.
During gestation to timely detect possible deviations fetal development, it is advisable to focus on such data in the table:
| A week | hormone level mIU / l |
| The lack of a gestational sac | 0-5 |
| unconfirmed birth | 5-25 |
| 3-4 | 250-150 |
| 4-5 | 100-4850 |
| 5-6 | 1110-31500 |
| 6-7 | 2500-82000 |
| 7-8 | 23000-150000 |
| 8-9 | 27300-234000 |
| 9-13 | 21000-291000 |
| 13-18 | 6100-103000 |
| 18-23 | 4700-80000 |
| to 41 | 2700-78000 |
What is the rate at 7 weeks pregnant
HCG at 7 weeks of pregnancy, the rate of which varies 5000-200000 indicates the normal development of the unborn child. During this period, laying the basic organs and systems is completed, so they begin to develop.
In some cases, it may be an error in test results, however, if the deviation is greater than 3000 mIU / L or more, the woman sent for re-analysis. Before carrying out laboratory tests required to specify the period of embryonic development. It is necessary to identify deviations. A woman should not forget that the level of human chorionic hormone changes every 2 days, increasing by 1.5-2 times.
Increased rate of hCG may indicate a multiple pregnancy. In the presence of 2-3 embryos at 7 week should be hCG is 3-4 times the normal level. The division of the fertilized egg depends on genetic predisposition and age. Often fixed split ovum in women older than 30 years. This phenomenon is typical for patients who had been treated for a long time infertility, stimulated ovulation drugs with polycystic ovaries.
Suspect the presence of multiple pregnancy is possible by the following features:
- expressed toxemia;
- rounded belly appears ahead of schedule;
- HCG level deviates by more than 2 times.
hormone Indicator determined in laboratory studies. By the level of gonadotropin impossible to diagnose exactly, but deviations from the norm allow time to fix the pathological process and start the appropriate treatment. The lower the serum hormone levels, the more pronounced intrauterine fetal abnormalities. The main indications for laboratory tests are:
- high probability of miscarriage;
- ectopic implantation of the ovum;
- amenorrhea;
- malignant neoplasms.
Seventh week - a milestone at which ends organs tab, increases the risk of abnormalities.
In the fetus has a brain, gastrointestinal tract and heart.
At low or excess levels of the hormone may abnormal development of these vital organs that later manifested as hydrocephalus, esophageal atresia, or heart disease.
The causes of variances
Elevated levels of gonadotropin in the period of 21 days suggests a multiple pregnancy. If it is not confirmed, may develop dangerous fetal abnormalities in the central nervous, endocrine and digestive systems of the fetus. Women have expressed toxicosis, there is a risk of developing gestational diabetes mellitus.
Allocate the following pathologies of embryonic development at high hCG:
- Down's syndrome;
- hydrocephalus;
- anencephaly;
- exencephalocele;
- pyloric stenosis.
Low hormone levels shows the following pathological processes:
- the absence of the ovum;
- incorrect hormonal drugs;
- malignant neoplasms of lungs, urinary system organs, ovaries and uterus;
- hydatidiform mole, recurrent disease process;
- a recent abortion, miscarriage.
If conception confirm instrumental and laboratory examination methods, against a low level of the hormone human chorionic fetal possible fading. Often an indicator of hCG caused by improper implantation of the ovum in the fallopian tubes, placental insufficiency. Low plasma gonadotrophin concentrations can lead to rejection of the embryo, which is why there is a spontaneous miscarriage or delay in embryonic development.
At low levels of hCG blood test pass 2 times to avoid errors. If the deviation is confirmed, ultrasound is conducted. Assigned medication preparations containing human chorionic hormone.
