Close Advertising Embryology | Fertilization, Cleavage, Blastulation | First week of embryonic development | Zygote The first week of embryonic development is filled with an eclectic arrangement of physical and biochemical changes. Each step is … Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window) Influencers 2068 views 0 / 0