Dead Horse?

A fertilized human egg, the instant the sperm penetrates the egg, can begin growing in a petri dish. It can then be implanted in the womb of an adult woman, and given sustenance, it will continue growing. It's not the woman growing, it's the woman feeding the egg, which grows of it's own accord. How can I make this statement? Because that egg will grow in any woman that feeds it the way the female body naturally does. If it was just part of the mom, it would not continue growing separate from the mom. Instead, through the wonders of science, we know that the growth of a fertilized human egg will continue of it's own accord. In vitro fertilization.

So why is such a huge chunk of our population convinced that halting the feeding of a fertilized human egg is different from halting the feeding of a newborn child?