Embryo quality refers to the quality and shape of embryo development and is an important indicator for evaluating the success rate of embryo implantation. The signs of good embryo quality include the following aspects. Cell division speed During normal embryonic development, cell division speed is an important reference indicator. Generally speaking, good embryonic cells divide at a normal rate, and each cell can complete division on time to form more cells. A good embryo with evenly distributed cells should have cells evenly distributed, with each cell being the same size and similar in shape. If the cells are unevenly distributed or there is obvious asymmetry, the embryo may be abnormal. Embryos with high transparency have high transparency, which means that the materials in the cells are evenly distributed and there are no holes or necrotic tissue formed inside the embryo. Embryos with low transparency may have quality issues. Embryos with strong adhesion have strong adhesion and can adhere tightly to the endometrium, thus having a higher implantation success rate. If the embryo does not adhere well, implantation may fail. An embryo with normal chromosomes should have normal chromosomes and no problems such as abnormal chromosome numbers, structural abnormalities, and chromosomal mutations. If there are problems with the embryo\’s chromosomes, it may lead to abnormal embryo development or spontaneous abortion. In short, good embryo quality is the key to successful embryo implantation. Through careful observation and scientific evaluation, we can determine whether the embryos are of good quality, thereby providing better reproductive medicine services to patients.