proembryo การใช้

However, some methods might have a secondary effect of preventing implantation, thus allowing the proembryo to die.
Even after implantation begins, a preembryo ( and proembryo ) may exist up until formation of the primitive streak.
Between the stages of fertilization and proembryo, which is terminology that traditionally has been used to refer to plant life.
Use of the terms preembryo and proembryo, in the context of human development, has drawn criticism from opponents of embryo research, and from scientists who have considered this categorization invalid or unnecessary.
Following fertilization, the zygote undergoes an asymmetrical cell division that gives rise to a small apical cell, which becomes the embryo and a large basal cell ( called the suspensor ), which functions to provide nutrients from the endosperm to the growing embryo, and the product is an ovoid mass of tissue called the proembryo.