1. A sleeping person has already personality, memories, goals,... But their consciousness is currently on pause. An early fetus doesn't have the brain capacity to form or hold consciousness. sleep is vulnerable because you're body shuts down active defense systems and reduce sensory awareness, but your brain is still processing information, and removing "uneeded" information when the state of a fetus is the pre-development of those abilities.
2. Linguistic history doens't change anything about this ethical debate, there are words that don't make sense.
3. Everything in the human body, even with you right now, has human DNA; your cells, your tissue, your organs. Even if you have something like skin cancer, skin cancer has human DNA but has to be removed.
4. The Bible has so many texts and so many interpretations, there is also Genesis 2:7, life begins when God breathes the "breath of life" into Adam, and Exodus 21:22-25, the Mosaic law penalizes causing a miscarriage less severely than causing the death of the mother. So its up to interpretation and religion is so diverse, Christianity inst the only religion, so using it as an argument inst the best option.