Torpedo stage: Somatic embryos, in the process of creating artificial seeds, are usually encapsulated at the torpedo stage. This stage marks the development of the embryo's axis and cotyledons, which is important for the development of a proper plant.
Globular stage: This is an early stage of embryo development before the cotyledons.
Cotyledon stage: This is a later stage of development of the embryo when the cotyledons are formed.
Triangular stage: This is another intermediate stage of embryo development.