The process of embryogenesis begins when an egg or ovum is fertilized by a sperm cell to form a zygote. This zygote then undergoes mitotic division, a process that does not result in any significant ...

Embryology is the study of development of an embryo from the stage of ovum fertilization through to the fetal stage. The ball of dividing cells that results after fertilization is termed an “embryo” ...

Blastula embryos of the sea urchin Paracentrotus lividus, when dissociated into single cells by exposure to Ca2+- and Mg2+-free sea water, reassociate spontaneously to form aggregates capable of ...