https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5499222
31/5/2017 · Furthermore, the terms “zygote,” “embryo,” and “fetus” describe stages of biological human development and as such, do not describe the development into a human person. Proponents of the first hypothesis claim that personhood is attained from the moment of fertilization when a new zygotic genome is assembled, or even earlier when a spermatid …