All families hope that IVF can be successful at once, but the process of IVF in the United States is complex, and early preparation, ovulation promotion, embryo transfer, and pregnancy testing are all key points for IVF success. Today, the editor of 592 Baby Network will talk about the knowledge of biochemical pregnancy in IVF in the United States.

What is biochemical pregnancy? β secreted by embryonic trophoblast cells- HCG enters the maternal blood, however, for some reason, the&beta- The decrease in HCG leads to miscarriage within 5 weeks. Elevated HCG levels can be detected in the blood of pregnant women, with levels greater than 25mlu/ml or a positive urine pregnancy test. If the gestational sac is not visible on ultrasound examination, it means that the implantation of the fertilized egg has failed. Generally speaking, this situation is due to poor quality of the fertilized egg itself or chromosomal variation.

Can American IVF avoid biochemical pregnancy?

1. If there is no gestational sac in the uterus during an IVF pregnancy test in the United States, it indicates fetal arrest.

2. Biochemical pregnancy early pregnancy tests can only show weak positivity, making it difficult to achieve strong positivity. A low blood HCG value can only indicate pregnancy, but it cannot guarantee successful transplantation.

3. Spontaneous miscarriage usually does not exceed 50 days, and the grayish white material flows out, then the body naturally recovers.

Causes of biochemical pregnancy:

1. Pregnant women with incomplete physical function, insufficient progesterone, abnormal endometrium, and inability to implant fertilized eggs;

2. The fertilized egg itself has chromosomal abnormalities and other defects, leading to non union of sperm and egg;

3. Uterine factors: congenital dysplasia, submucosal fibroids, endometrial polyps, adhesions, endometrial tuberculosis, and other diseases.

4. Immune factors: In recent years, research on immune factors has mainly been divided into the same immune factor. Autoimmunity.

5. Immunity: Sperm, seminal plasma, or fertilized egg are antigenic substances that can be absorbed by the vagina and uterus. The female body produces antibodies through immune reactions, which can prevent sperm and egg from binding and fertilized egg from implanting; There are autoantibodies in female serum to prevent sperm from penetrating the egg, leading to infertility;

6. Poor embryo quality: Just like planting plants when we were young. No matter what kind of land you plant, if the seeds are not good, you cannot take root and sprout. The same applies to embryos. If the embryo quality is poor, you cannot get up. If you wake up, you will become biochemical due to poor development.

7. Excessive mental stress, especially due to pregnancy and severe anxiety, can also lead to the biochemical changes of in vitro fertilization embryos.

8. Insufficient uterine receptivity.

Repeated implantation failure may be due to uterine problems. It is recommended to check whether the endometrium is qualified and whether treatment is necessary.

The above is all about how doing IVF in the United States can avoid biochemical pregnancy. The probability of biochemical pregnancy in women under natural conditions is not yet clear. But abortion is in a sense a natural selection. Women of childbearing age should promptly go to the hospital for examination when encountering this situation.