Factors influencing embryo quality

An embryo of optimal quality (catalogued as an A-quality embryo) is more likely to implant than an embryo of intermediate quality (catalogued as a C-quality embryo).

Although much of the embryonic quality is determined by the quality of the gametes, i.e., the egg and the sperm, the fact is that the culture conditions are also determinant and must be optimal for embryo development to be favored.