Here are two related differences between a child is and an adult. (1) It is very expensive to turn a child into an adult. (2) An adult is highly specific and not replaceable, while a fetus has a lot of subjective uncertainty and is fairly easily duplicated within that uncertainty. Uploading is relevant to both of these points.
Haven't had one of these for awhile. This thread is for questions or comments that you've felt silly about not knowing/understanding. Let's try to exchange info that seems obvious, knowing that due to the illusion of transparency it really isn't so obvious!