美国试管婴儿专家如何筛选健康囊胚？

In the process of IVF, selecting healthy blastocysts is a crucial step, which directly affects the success rate of pregnancy and the health status of the future baby. IVF experts in the United States use unique methods and strict criteria to select healthy blastocysts. With extensive expertise and clinical experience, these experts are committed to providing each IVF helper with high quality blastocysts through scientific methods and accurate judgment to improve the chances of pregnancy success and ensure the health of their future baby.

How do IVF experts screen for healthy blastocysts?1, observe the growth rate of blastocysts

Typically, after sperm and eggs, the embryo should develop into 4 cells on the next day and have about 6-8 cells on the third day. If the embryo has too many or too few cells, it means that the embryo may grow too fast or grow too slowly. For embryos in this condition, they have a relatively low chance of successful implantation after uterine implantation, and transplantation of such embryos is therefore not usually recommended if more healthy embryos are available to choose from.

2. Appearance characteristics of embryonic fission sppheres

Clestomeres are cell divisomes in the embryo, and their morphology is also one of the important markers for assessing the quality of the embryo. High quality embryos usually have smaller blastomeres with high morphological similarity, ordered arrangement and without excessive fragmentation. When selecting blastomeres, special attention should be paid to the presence of abnormalities, such as vacuoles or debris, and the careful observation of the number and degree of cells in the blastomeres meet the normal criteria.

3, the proportion of embryonic fragments

The fragmentation rate of an embryo is the ratio of cell debris formed during development to the entire embryo volume. Typically, embryos with a fragmentation rate below 5% were considered high quality, below 25% were considered acceptable, and more than 50% were treated as poor quality. The elevated rate of embryonic fragmentation is usually caused by factors such as poor development or suboptimal culture conditions. Therefore, when selecting embryos, attention needs to focus on whether the fragmentation rate meets the normal criteria and ensure that culture conditions favor the normal development of the embryo.

4, the trophoblast cell number and appearance characteristics of the embryo

Trophoblast cells refer to the population of cells in the outer layer of the embryo, and the more cells, the more orderly the arrangement, usually reflecting the better quality of the embryo. Moreover, the morphology of the trophoblast cells should also be normal and no abnormal cellular structures should be present. The main responsibility of trophoblast cells is to protect the embryo and provide it with the required nutrients, so the number and morphology of trophoblast cells are crucial for the normal development of the embryo. When selecting embryos, the morphology and number of trophoblast cells meet normal criteria.

5, the number and structural characteristics of cell clusters within the embryo

Inner cell groups play a key role in the formation and development of fetal organs in the future, so their number and morphology are important for the healthy development of the fetus. High-quality embryos usually exhibit a uniform, symmetric globular structure of inner cell groups at a developmental stage consistent with the expected developmental stage, along with a small number of irregular cells. At least 85% of the cells should be an intact, viable embryonic cell mass.

Guidelines for IVF embryo culture in the United States:
1. Environmental settings and conditions of the laboratory

The culture of blastocysts requires special care environments because early developing embryos are very sensitive to suitable temperature and humidity conditions. Embryo culture chambers must maintain a highly sterile environment and strictly monitor temperature and control humidity. In addition, the culture medium and petri dishes used must also be specially disinfected and treated to ensure that the embryo can grow and develop normally.

The little Monster Reproductive Center has four double A certified laboratories in the United States, equipped with spindle observation system, microscopy, laser membrane breaker, blastoyst incubator, PH tester, ICSI equipment, carbon dioxide incubator, Coda Air air purification system, incubator and other advanced equipment. The incubator of the blastocyst was designed to mimic the environment of the human uterus to breed embryos under conditions similar to the uterine environment in terms of being light free, sterile, dust free, stable temperature, humidity, air pressure, carbon dioxide and oxygen concentration. Such an environment ensures the safety of the embryos and facilitates their smooth progression to the blastocyst stage.

2. High-level of medical professional skills

IVF requires teams of experienced doctors and nurses to ensure the process is safe and effective. At the little Monster Reproductive Center in America, our test tube experts have at least 20 years of experience, and some even more than 40 years of rich experience. They are well versed in the basic principle of test tube sac, and can accurately manage the nutrients, energy, osmotic pressure and acid-base balance required by the embryo, almost without interference to the living activities of the embryo, thus ensuring the safety and effectiveness of test tube sac.

In addition, the IVF experts will comprehensively assess the medical history and health status of the expectant parents to develop a personalized IVF maintenance regimen suitable for them. Experts pay close attention to the patients’ response and adjust the treatment plan as needed to ensure the safety and health of each patient.

3. Quality of the sperm and eggs

The maturation status of sperm and egg is one of the important factors affecting the success rate. Before performing a tube, the expert usually performs a series of tests and tests to assess the quality of sperm and eggs. Therefore, before tube preservation, doctors often recommend that people prepared to be parents maintain a good lifestyle, eat a reasonable diet, and avoid exposure to harmful substances, such as cigarettes and alcohol. These measures help to improve the quality of sperm and eggs, thereby increasing the chances of success.