Biologists from 1,058 academic institutions around the world assessed survey items on when a human's life begins and, overall, 96% (5337 out of 5577) affirmed the fertilization view.
Most liberals ignore the science associated with the beginning of human life. For them the fetus becomes a person when they are born. But the movement to confer legal personhood on fetuses, zygotes, and even fertilized eggs pre-birth has been gaining legal ground for years.
Really? Post 140:
The thread title is "Biologically, when does human life begin?"
“A zygote is the beginning of a new human being. Human development begins at fertilization, the process during which a male gamete or sperm…unites with a female gamete or oocyte…to form a single cell called a zygote. This highly specialized, totipotent cell marks the beginning of each of us as a unique individual.” The Developing Human: Clinically Oriented Embryology, Keith L. Moore & T.V.N. Persaud, Mark G. Torchia
“Although life is a continuous process, fertilization is a critical landmark because, under ordinary circumstances, a new, genetically distinct human organism is thereby formed.” From Human Embryology & Teratology, Ronan R. O’Rahilly, Fabiola Muller.
Diane Irving, M.A., Ph.D, sums up much of the scientific consensus in her research at Princeton University:
“That is, upon fertilization, parts of human beings have actually been transformed into something very different from what they were before; they have been changed into a single, whole human being. During the process of fertilization, the sperm and the oocyte cease to exist as such, and a new human being is produced.”
Only proper understanding of the process of human embryogenesis enables answering scientifically the question when the life cycle of human individual starts. Therefore, in the following text the main steps of the human developmental process are going to be briefly described, primarily during the first 15 days after fertilization.
A human being originates from two living cells: the oocyte and the spermatozoon transmitting the torch of life to the next generation.
pmc.ncbi.nlm.nih.gov
The Scientific Consensus on When a Human's Life Begins
Peer-reviewed journals in the biological and life sciences literature have published articles that represent the biological view that a human's life begins at fertilization ("the fertilization view"). As those statements are typically offered without explanation or citation, the fertilization view seems to be uncontested by the editors, reviewers, and authors who contribute to scientific journals. Biologists from 1,058 academic institutions around the world assessed survey items on when a human's life begins and, overall, 96% (5337 out of 5577) affirmed the fertilization view.
Peer-reviewed journals in the biological and life sciences literature have published articles that represent the biological view that a human's life begins at fertilization ("the fertilization view"). As those statements are typically offered without explanation or citation, the fertilization...
pubmed.ncbi.nlm.nih.gov
When Human Life Begins - American College of Pediatricians – March 2017
The predominance of human biological research confirms that human life begins at conception—fertilization. At fertilization, the human being emerges as a whole, genetically distinct, individuated zygotic living human organism, a member of the species Homo sapiens, needing only the proper environment in order to grow and develop.
American College of Pediatricians – March 2017 ABSTRACT: The predominance [...]
acpeds.org
Does science define life as "beginning at conception"?
Overall, 95% of all biologists affirmed the biological view that a human's life begins at fertilization (5212 out of 5502).
https://www.princeton.edu/~prolife/articles/embryoquotes2.html The following references illustrate the fact that a new human embryo, the starting point for a
skeptics.stackexchange.com