Hi JCS, those are some good questions!
Science proves that embryos don't even have a heartbeat until three-four weeks, how can you possibly then say that life "begins at conception".
I can say that a new human being comes into existence at fertilization because a new human being is not dependent upon a beating heart. And that statement is problematic for you anyway because if you're going to argue that we do indeed have a new human being at a heartbeat, then as a heartbeat can be detected as early as 6 weeks, you're going to have a problem with being pro-choice.
One positive thing science has done for us in this area is helped us determine when a new human being comes into existence, and it has altogether proven that it is indeed at fertilization. I don't want to overwhelm the post with quotes, but here are a few:
“The life cycle of mammals begins when a sperm enters an egg.” Okada et al., A role for the elongator complex in zygotic paternal genome demethylation, NATURE 463:554 (Jan. 28, 2010)
“Fertilization is the process by which male and female haploid gametes (sperm and egg) unite to produce a genetically distinct individual.”Signorelli et al., Kinases, phosphatases and proteases during sperm capacitation, CELL TISSUE RES. 349(3):765 (Mar. 20, 2012)
“Fertilization – the fusion of gametes to produce a new organism – is the culmination of a multitude of intricately regulated cellular processes.” Marcello et al., Fertilization, ADV. EXP. BIOL. 757:321 (2013)
“Human life begins at fertilization, the process during which a male gamete or sperm (spermatozoo developmentn) unites with a female gamete or oocyte (ovum) to form a single cell called a zygote. This highly specialized, totipotent cell marked the beginning of each of us as a unique individual.” “A zygote is the beginning of a new human being (i.e., an embryo).” Keith L. Moore, The Developing Human: Clinically Oriented Embryology, 7th edition. Philadelphia, PA: Saunders, 2003. pp. 16, 2.
I could post dozens more, but you get the point. We know scientifically that a new human being comes into existence at fertilization.
As Christians then, how does the truth of when a new human being comes into existence play into Scripture? I think you'll agree that when we look at Scripture we cannot find a single example of a living human being without a soul. We also cannot find anywhere in Scripture where a human being is not created in the image of God, and not possessing inherent moral worth and value.
Remember John the Baptist in Luke 1? He literally leaped for joy in his mother's womb. Luke also tells us that John the Baptist was filled with the Holy Spirit while still in his mother's womb!
The fact is that human beings are created unique among all of God's creation in that we alone possess inherent moral worth and value. We are all created in God's image. Our life begins at fertilization. We spend 25 years developing. At no point during our developmental period are we not a human being.
I don't understand why you're discriminating against a human being because they're simply young, or simply not as developed as another human being. Why?
This passage has come up a number of times on this forum, and ironically it actually says the exact opposite of what you think it does.
Exodus 21: King James Version (KJV):
22 If men strive, and hurt a woman with child, so that her fruit depart from her, and yet no
mischief follow: he shall be surely punished, according as the woman's husband will lay upon
him; and he shall pay as the judges determine. And if any mischief follow, then thou shalt give life for life, Eye for eye, tooth for tooth, hand for hand, foot for foot, Burning for burning, wound for wound, stripe for stripe.
Now from the Hebrew Lexicon
So that her fruit:
Hebrew: יֶלֶד yeled
he KJV translates Strongs H3206 in the following manner:child (72x), young man (7x), young
ones(3x), sons (3x), boy (2x), fruit (1x), variant (1x).
child, son, boy, offspring, youth
1. child, son, boy
2. child, children
3. descendants
4. youth
Yeled is not miscarriage nor still birth, it's a live child.
Is there a Hebrew word for miscarriage and stillborn? Yes and it is not Yeled.
Exodus 23:26 KJV
26 There shall nothing cast their young, nor be barren, in thy land: the number of thy days I will fulfill.
The above now in the Hebrew lexicon:
שָׁכֹל shakol
The KJV translates Strongs H7921 in the following manner:bereave (10x),barren (2x),
childless(2x), cast young (2x), cast a calf (1x), lost children (1x),rob of children (1x), deprived
(1x), misc (5x).
שָׁכֹל shâkôl, shaw-kole'; a primitive root; properly, to miscarry, i.e. suffer abortion; by analogy, to
bereave (literally or figuratively):—bereave (of children), barren, cast calf (fruit, young), be (make) childless, deprive, destroy, × expect, lose children, miscarry, rob of children, spoil.
So we can see shakol is not used in Exodus 21:22ff.
Yaled is alive; shakol is miscarriage.
In summary, Exodus 21 says life for life in the case of the death of the unborn.
I get that there are complicated practical issues that arise when we acknowledge that a human being begins its life at fertilization. I'm not oblivious to that. But difficult moral and practical situations don't change reality.
You've essentially come out and said that since there are difficult moral and practical situations that follow from acknowledging a new human being from fertilization that you're going to try and avoid those situations by making them go away by deciding, without any Biblical or scientific basis that a new human being doesn't come into existence until some point after fertilization. I can't help but wonder where your Biblical integrity is in that decision making. We don't change our views and beliefs as Christians because the world is corrupt, because sin has made things difficult, and because they are politically incorrect. Our beliefs should be guided by Scripture.