Reply #117: In chapter 15 (Rebirth), it discusses how the soul enters the fetus.

[I Have A Dream]

It discusses that it takes some time for the fetus' brain to "meld" with the soul that has been assigned to it. The soul in case 29 said that there's an emptiness before the soul's arrival which the soul fills to make the child whole. Dr. Newton asked this soul whether there's any conflict within the fetus against the soul, and the soul said that there's a slight resistance until there is familiarization. The soul said that the soul unifies with undeveloped mind so that the soul isn't viewed as an alien entity; the fetus recognizes the soul as a friend, a twin, who is going to be part of him/her, and that it's as if the fetus was waiting for the soul to come to him/her.

It does say that when a soul decides to enter a baby, apparently that child has no free choice in accepting or rejecting the soul.

As I was reading this, I wondered if there was ever a glitch where someone is born without a soul. If so, what would that person be like? I seem to remember a passage in the book (but it may be something else that I'm currently reading) that said that the human would be more like an animal if it didn't have a soul. I'll try to find that passage, and if it's in the other book, I'll give you the information from it also.

In reference to the human's non-soul consciousness, maybe it's the same as what happens to animals' consciousness. I don't know if animals have souls per se; however, I have definitely heard that they live on and are waiting for us on the other side when we "cross over". This would be an interesting discussion.