<P> The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus . The germinal stage takes around 10 days . During this stage , the zygote begins to divide , in a process called cleavage . A blastocyst is then formed and implanted in the uterus . Embryogenesis continues with the next stage of gastrulation , when the three germ layers of the embryo form in a process called histogenesis , and the processes of neurulation and organogenesis follow . </P>
<P> The germinal stage refers to the time from fertilization through the development of the early embryo until implantation is completed in the uterus . The germinal stage takes around 10 days . During this stage , the zygote begins to divide , in a process called cleavage . A blastocyst is then formed and implanted in the uterus . Embryogenesis continues with the next stage of gastrulation , when the three germ layers of the embryo form in a process called histogenesis , and the processes of neurulation and organogenesis follow . </P>
an embryo during the late stages of development
an embryo during the late stages of development
blastocyst
blastocyst