There is no indication that a corpse is aware of anything when reflexes are provoked. That is because the corpse is dead and has no functioning central nervous system. Unlike a corpse, a developing embryo past 5 weeks has a functional brain, which receives and processes information from its environment, just like any other living person's brain functions.
That would also be true of the 3 to 5 week old fetus you described. It cannot be proved that it has awareness or consciousness or thought of any kind.
Unlike a corpse, a developing embryo past 5 weeks has a functional brain, which receives and processes information from its environment, just like any other living person's brain functions.
Not every living person's brain as the example of my mother with Alzheimer's addressed. But I don't think brain waves have ever been detected in a five week old fetus. If it has it is still irrelevant. Not all living beings have brains so it isn't a defining characteristic of a living being.