part_of
part of
part of
immediately preceded by
immediately preceded by
occurrent
spermatogenesis period
embryogenesis
1-cell stage
fertilized egg
A fertilized egg, right after fertilization. The embryo is characterized morphologically by the fact that it is a single diploid cell surrounded by a fertilization envelope. This stage corresponds to an embryo of age 0 hour post-fertilization.
UBERON:0000106
ecao_developmental_stage
zygote stage