美国墨西哥日本试管科普：囊胚移植为什么受关注？

U.S., Mexico, and Japan IVF: Why Is Blastocyst Transfer Receiving Attention?

After egg retrieval, the eggs need to be fertilized by sperm, after which the embryos begin to divide continuously. Early embryos go through stages such as cleavage and morula, usually developing into blastocysts around day 5–6 after fertilization.

Not every fertilized egg can continue to develop through this process. As culture progresses, the number of embryos gradually decreases, and the number that ultimately develops into blastocysts is one of the important references for evaluating the outcome of embryo culture. Therefore, retrieving more eggs does not necessarily mean having more transferable embryos in the end.

A blastocyst has completed relatively extensive early development, with further cell differentiation forming the inner cell mass and trophectoderm. In natural conception, the embryo also develops for several days before entering the uterus and beginning implantation. Therefore, blastocyst transfer can better align the timing of embryo transfer with the endometrium. At the same time, the ability to develop to the blastocyst stage itself means that the embryo has already undergone a round of natural developmental selection.

Why Is the Blastocyst Stage Also an Important Part of IVF-PGT?

For families planning IVF-PGT, the blastocyst stage also involves an important step—IVF-PGT.

Once the embryo reaches a stage suitable for testing, IVF-PGT can provide information about the embryo’s chromosomes and relevant genetic information. Combined with the embryo’s own developmental status, this can provide more reference for subsequent embryo selection and transfer. Compared with focusing solely on the embryo’s appearance, incorporating genetic information can make the overall embryo planning more comprehensive.

Of course, IVF-PGT focuses on chromosomal and relevant genetic information and cannot determine complex traits such as a future child’s intelligence or personality. Understanding what information the testing can provide also helps in gaining a proper understanding of its role in IVF-PGT.

What Really Matters Is the Complete Process “From Egg to Embryo”

The outcome of IVF is not determined by any single stage alone. Ovarian reserve and age can affect egg retrieval, sperm and eggs affect fertilization, laboratory culture is related to whether embryos can continue to develop, while the endometrium provides the environment for the embryo to ultimately implant.

The team founded by Dr. Nathan Zhang at IVF USA has been engaged in overseas assisted reproductive consulting services for more than ten years, providing U.S. egg freezing, U.S. IVF, and third-party assisted reproductive services for those in need. With nearly 20 years of experience in the field of overseas assisted reproduction, IVF USA has responded to the diversification and personalization of reproductive needs by entering the Mexican market early and becoming the China agent for Power Fertility Center, Mexico POWER Fertility Center (POWER IVF). Dr. Nathan Zhang’s business has now expanded beyond the U.S. to include IVF and egg freezing in Mexico, IVF and egg freezing in Japan and Thailand, as well as services in Taiwan and Hong Kong. We will tailor personalized treatment plans based on your specific circumstances to help you achieve your reproductive goals smoothly. Here, every life is cherished, and every hope is ignited. Let us work together to welcome the arrival of new life!