It has been recognized for millennia that both a paternal (semen) and a maternal contribution are required for the formation of a new human life. Being a biologist, a textbook author, and a mother, i’ve thought a great deal about the question of when a human life begins So here are my selections of times at which a biologist might argue a human organism is alive. Human rectus completely separated after migrating over half the distance to the midline In mouse, the rectus is not segregated from the other muscles until reaching the midline. According to birth certificates, the life of a child begins once their body comes out of the mother’s womb
But when does their organismal life begin Science holds a palette of answers—depending on how one defines a human life. The only extant members of the human tribe, hominini, belong to the species homo sapiens.
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