Let me present an odd hypothetical: You are in a home where a fire has broken out. You only have time to quickly pick something up and run out. There are 2 zygotes inside of coolers which are alive, and there are 2 infants. You cannot carry all of them, you can only pick up 2. Would you have a difficult time deciding? Obviously that is a ridiculous scenario, but I use it only to highlight that I think the vast majority of people place a different value on a zygote and an infant. A zygote is a single cell. It has no heart, no brain, no organs at all. It has no body. It is a single cell. You may consider a zygote equal to a fetus, equal to an infant, equal to a child, equal to an adult. That's your prerogative. I don't think it's likely that you will convince most people that a zygote is equal to a human being at all stages of development, though. I certainly can't imagine placing the same value on a single cell that I do an adult or an infant.