This is absurdly wrong.

There is never any period at which there is not life. Sperm are alive. Eggs are alive. The fertilized embryo is alive.

Quality of life is unrelated to first breath except that when you're born you need to breathe because you can't get oxygen through the umbilical cord any longer. The Apgar scores are to check for problems that might need urgent attention. Most babies who don't have a perfect score nonetheless grow up fine.

The last part is not quite coherent enough for me to even tell what you're claiming, but it also seems likely to be wrong. (Except that gestating babies have human parts because they are humans--yes, that's true.)