When vinegar comes in contact with the fertilized egg, it causes the egg's outer layers to break down. This can prevent the embryo from developing into a viable organism, as the protective shell is compromised and the embryo may not be able to survive outside its protected environment.
In some cases, vinegar may also cause the embryo to deform or become damaged, impacting its viability. The extent of the damage caused by vinegar depends on the concentration of the vinegar, the duration of exposure, and the stage of development of the embryo.
Due to its potential harmful effects, vinegar is generally not recommended for handling fertilized eggs or for preserving embryos, especially in delicate biological applications or where the survival and integrity of the embryo are crucial.