MarkDuffy
Diamond Member
Not all zygotes make it to the next stage of prenatal development, however. Researchers estimate that 30 to 70 percent of all naturally occurring conceptions fail either before or at the time of implantation. [ie zygote stage]
Explore the Stages of Prenatal Development
Who do we charge with murder?
Explore the Stages of Prenatal Development
Who do we charge with murder?