Quote from: SM on Yesterday at 12:54:33 PMFacehugger can stay on longer to protect the embryo. If someone tries to remove the embryo it threatens the host like when they tried to remove the hugger from Kane.
The face hugger died long before Kane gave birth, leaving him comatose and vulnerable. If the facehugger was in place the entire time until right before he popped I'd buy it, but it's not the case.
For Kane the argument could be that it stayed on to keep him alive until he got on the ship, but again, it waits around for a long time after he's back in a breathable atmosphere.