The precision of IVF surgery in the United States is very high, and the success rate is directly related to the quality of embryos. Different hospitals have different procedures to implant different embryos for patients. American IVF experts said that IVF assisted pregnancy usually involves fresh embryos, blastocysts and frozen embryos. The key factor of IVF success rate lies in the direct relationship between embryo culture technology and embryo quality. So what should be done?
First of all, we need to know how American IVF experts define fresh embryos, blastocysts and frozen embryos. Which operation method can achieve a higher success rate of IVF?
Fresh embryo: Sperm and egg combine to form a fertilized egg, which will continue to splinter cell and form a solid embryo on the third day, that is, a morula. The fresh embryo in the test tube refers to it. Fresh embryo transfer means that the embryo has not been frozen, that is, American IVF doctors cultivate fertilized eggs on the fifth day to form blastocysts composed of more than 100 cells, and then transfer them after gene screening.
Freeze embryos: put blastocysts into high-concentration dehydrated solution, and then immediately store them in the same formula of liquid nitrogen (the process does not exceed 1 sec), so as to minimize the exposure time of blastocysts to the solution and protect them from freezing to the greatest extent. American IVF experts who cooperated with American Mummy Gang explained that blastocysts are dormant in extremely cold liquid nitrogen at-196℃, and will not continue to grow and develop, nor will they age, nor will they affect their genetic material. After resuscitation, the success rate of IVF is also very high.
Blastocyst: The morula formed by the fertilized egg will continue to divide on the third day and become a hollow blastocyst on the fifth day. In other words, the cells of morula continue to divide, and small cavities gradually appear between cells. After about 2 days, they finally merged into a big cavity, and the morula became a hollow blastocyst. Blastocyst, also known as blastocyst, is the fifth day of fertilized eggs' survival. It is understood that the two days from the artificial cultivation of fertilized eggs to the development of blastocysts are very critical, and the requirements for temperature, air oxygen content and carbon dioxide content are very high. Because most hospitals in China do not have blastocyst culture technology, most of them can only do early embryo transfer. Because of the superior laboratory conditions and the mature technical support of the third generation of IVF in the United States, the blastocyst culture technology in the United States is very mature.
The three transplantation methods of IVF in the United States have their own advantages, but in terms of success rate, blastocyst transplantation is ≥ frozen embryo ≥ fresh embryo. Due to the long survival time of blastocysts in vitro and the large number of dividing cells, the success rate of implantation is the highest among the three kinds of transplantation, and the success rate of test tubes is also the highest.
American IVF experts suggest that most women choose American IVF blastocyst transfer from the perspective of female body. According to American IVF experts, because women's bodies have undergone ovulation induction and egg retrieval surgery, the body's endocrine will change somewhat, which will certainly affect the success rate of IVF; If women are healthy, although there will be a temporary imbalance, it will not affect the success rate of IVF; If you choose frozen embryo transfer and nurse the female body, the success rate of IVF will be higher. Keeping the body in the best condition is the premise of obtaining a high pregnancy rate.
As far as embryo quality is concerned, American IVF experts say that the success rate of blastocyst transfer in IVF in the United States is definitely higher than that of early embryos, because blastocysts have been cultured for two days longer than embryos, and the cells have changed from single digits to three digits, and great changes have taken place in morphology. Not only the vitality is strengthened, but also the implantation area after implantation in the uterus is enlarged, which is an important basis for the survival of blastocysts. What's more, American IVF hospitals use the third generation of IVF PGS/PGD gene screening technology to ensure the quality of blastocysts.
It is understood that the purpose of "blastocyst culture" of IVF in the United States is to culture blastocysts until the fifth day and extract blastocyst cell sections, and then screen and diagnose them with PGS/PGD genes, eliminate inferior and genetically defective blastocysts, and transplant only healthy blastocysts into the female uterus to improve the blastocyst implantation rate and the success rate of IVF.
According to authoritative statistics, most test-tube babies in China are embryo transfer, and the success rate is generally 30%~40%. IVF in the United States is blastocyst transplantation, and the success rate is generally around 80%, which is far ahead in the world. In particular, the third generation of IVF technology in the United States is to protect the success rate of IVF in the United States. So many infertile families will choose American IVF to have a healthy baby.