In vitro fertilization experts in the United States point out that frozen eggs are frozen eggs, also known as frozen eggs, that is, to remove healthy eggs from the mother and freeze them to prevent them from aging with the aging of the human body. When you want to have a child, you can remove frozen eggs. According to research by reproductive experts, women over the age of 40 have a lower pregnancy rate, while women between the ages of 25 and 35 have the highest success rate.

The conception rate of women will decrease with age. Some women want to freeze their eggs before 30, which can improve the fertility rate of future surgeries. And frozen eggs can be prepared for unexpected needs. For women who have not yet had a fertility plan, frozen eggs can be used to preserve young eggs, and if necessary, surgery can be performed to conceive. Because the conception rate of eggs is much higher when they are young, and the survival rate of in vitro fertilization in the United States is also improving, more and more women are choosing to freeze eggs in the United States to ensure the quality of their eggs.

According to American in vitro fertilization experts, many patients choose frozen eggs as American in vitro fertilization. Experts explain that in vitro fertilization doctors in the United States will take eggs and freeze them when the mother is healthy to prevent the quality of the eggs from decreasing as the body ages. When they want to have a child or have conditions to have a child, they will take out frozen eggs, thaw them, and combine with sperm to form a fertilized egg.

Generally speaking, in vitro fertilization technology in the United States cultivates fertilized eggs to the fifth day blastocyst stage, conducts PGS/PGD gene screening and diagnosis on the third generation of in vitro infants before implantation into the mother's body, and then transfers the highest quality healthy blastocysts to the female uterus to continue growth and development, fundamentally ensuring the health of the fetus. The mother can then start pregnancy for several months until delivery. However, since freezing eggs is carried out in an extremely cold liquid nitrogen environment of -196 ℃, this requires comprehensive medical equipment and rich medical experience. Therefore, when choosing frozen eggs, American in vitro fertilization experts remind patients to choose hospitals with professional qualifications.

Frozen embryos refer to frozen embryos. According to in vitro fertilization experts in the United States, freezing embryos is the only mature method in the world to preserve reproductive function. This technology stores embryos obtained by in vitro culture technology in a liquid nitrogen environment at -196 ℃ and preserves them for a long time.

According to in vitro fertilization doctors in the United States, after successful fertilization of the fertilized egg, they will place the embryo and cryopreservation solution into a cryotube and use two cooling methods, namely slow (2-3 day embryo) and fast (5-6 day embryo), to allow the embryo to rest and be stored in 196 degrees liquid nitrogen. If there are high-quality remaining embryos, they can be cryopreserved, thawed in natural or artificial cycles, and implanted into the uterine cavity to increase the chances of conception. It is understood that the method of freezing embryos can be used for patients with a large number of embryos obtained during the superovulation cycle, good quality, inability to transfer at once, excess frozen embryo preservation, and severe ovarian hyperstimulation syndrome.

During the treatment cycle, embryo transplant recipients should not transfer frozen embryos to future natural or artificial cycles. The clinical pregnancy rate of frozen embryo resuscitation is 48.28%, and the clinical pregnancy rate of blastocyst cryoresuscitation is 63.48%. According to in vitro fertilization experts in the United States, the biggest difference between frozen embryos and frozen eggs lies in the different forms of freezing. The frozen form of frozen eggs is single cell eggs, while the frozen form of frozen embryos is early embryos, which can be directly thawed and transferred. Moreover, when the egg is frozen, it is a single cell and genetic screening diagnosis cannot be performed before freezing. It is unknown whether there are chromosomal abnormalities or genetic disease genes.

Before freezing embryos, the third generation in vitro fertilization (IVF) PGS/PGD technology in the United States was used to screen and analyze the chromosome number and structure of embryos, eliminate chromosomal abnormalities, and diagnose the impact of genetic diseases on embryos. Therefore, before undergoing in vitro fertilization in the United States, in vitro fertilization experts advise patients to choose their own plan to freeze embryos or eggs.