that has nothing to do with it. It's like the sand pile paradox, which states that there is a pile of sand. A man comes along and adds sand, one at a time, to the pile. At what point is it considered a mountain? The same concept applies. The point in which a human becomes a sentient being isn't clearly defined and differs from person to person. So when you say that a baby has no sentience before 3 months, well, how would you know? And why three months exactly? In my opinion, since that cant be well defined, doctors shouldn't kill any fetuses because we cannot clearly, 100% define when they are sentient.