Talk Amongst Yourselves

A good friend of mine is an identical twin. I had him over for dinner tonight, and the following question arose.

Okay, we believe that life begins at conception and that even a single-celled human embryo is a completely human being with a soul.

In the case of identical twins, a single human embryo divides into two identical, separate human embryos.

Where does the second soul come from? Which has the older soul? Where does that soul come from (obviously from God)?

As I’ve thought about this, I came up with two possibilities, and they both seem totally absurd:

1) The initial, single soul divides into two separate souls.

2) God in his foreknowledge gave two souls to the initial single human embryo (prior to the split), and thus the division into two embryos is in part due to the overabundance of souls. This seems more likely, but still far-fetched.

What do you guys think? Any thoughts?