What does embryogenesis mean?
The fertilisation of the egg cell or ovum by a sperm cell marks the beginning of embryogenesis. The fertilised ovum is referred to as a zygote and undergoes mitotic divisions and cellular differentiation leading to the development of a multicellular embryo.
In humans, embryogenesis is a complex process that occurs during the first eight weeks after fertilisation.
In plants, embryogenesis marks the beginning of the diploid stage as the haploid ovule and sperm come together to form the zygote.