Requirements of IVF for embryos
Test tube baby means to cultivate embryos in vitro through assisted reproductive technology and implant high-quality embryos into the mother to develop into a baby. The success rate of IVF is closely related to the quality of embryos. The following describes the requirements of IVF for embryos from four aspects: the health, quantity, appearance and development of chromosomes of embryos.
1. Embryo chromosome health
Embryonic chromosome health is critical to the success of IVF. Common forms of chromosome abnormalities include chromosome number abnormalities (very common is trisomy 21 syndrome) and structural abnormalities (such as chromosome deletion, duplication and inversion). Embryos with healthy chromosomes have normal 23 pairs of chromosomes, thus reducing the risk of hereditary diseases.
In order to ensure chromosome health, hospitals usually carry out genetic testing on embryos. Common detection methods include PGD (Preimplantation Genetic Diagnosis) and PGS (Preimplantation Genetic Screening). Through these testing methods, we can screen embryos with healthy chromosomes and improve the success rate of IVF.
2. Number of embryos
The success rate of IVF is also related to the number of embryos. Usually, doctors will cultivate multiple embryos during in vitro fertilization, and then select the best embryo for implantation. If the number of embryos is small, the choice will be reduced, thus affecting the success rate of IVF.
Therefore, in the process of IVF, the hospital will try to increase the number of fertilized eggs as much as possible through ovulation promoting drugs and careful embryo culture technology. This will increase the chances of selecting high-quality embryos and provide more possibilities for the success of IVF.
3. Appearance of embryo
The appearance of embryos is also one of the requirements of IVF for embryos. The evaluation criteria of appearance characteristics mainly include the degree of embryonic development and the evenness of cytoplasm. A well developed embryo means that the embryonic cells divide and develop normally and have higher vitality. An embryo with even cytoplasm means that the nutrients in the cells are evenly distributed, and the embryo may be healthier.
The hospital will use microscope and other technical means to observe the appearance characteristics of the embryo. According to the evaluation of appearance characteristics, doctors will select the best embryo for implantation to improve the success rate of IVF.
4. Development degree of embryo
The degree of embryonic development also plays an important role in the success of IVF. Embryos are usually divided into different development stages, such as 2-cell stage, 4-cell stage, 8-cell stage and blastocyst stage after fertilization. The ideal degree of embryonic development is determined by the time after fertilization and the number of embryonic cells.
The hospital will judge the degree of embryo development by the time of embryo culture and observing the number of cells in the embryo. A well developed embryo is more likely to be successfully implanted into the mother and develop into a healthy baby.
Summary
IVF has many requirements for embryos. First, the chromosome health of embryos is crucial to the success of IVF. Hospitals usually screen embryos with healthy chromosomes through gene testing. Secondly, the number of embryos will also affect the success rate of IVF. The hospital will try to increase the number of fertilized eggs. In addition, the appearance characteristics and development degree of embryos are also one of the requirements for IVF embryos. The hospital will select the best quality embryos for implantation according to the appearance characteristics and development degree. In short, only by meeting these requirements can IVF have a higher success rate.
