Do Fetuses have souls? Is the aquisition of a soul instantenous or continuous?

In Genesis 2:7, the first human was created in the following steps:

1) God formed man out of the dust ( creation of the human body)

2) He then breathed into its nostrils and became a living soul ( making alive of the human body)

From this creative act of God, we learn that a human body is not alive or functioning without a human spirit which is also evident in James 2:26.

Therefore, a functioning body is called "soul" for it has a spirit.

Eve was created out of Adam ( Genesis 2:18-25). In Romans 5:12, it is said that "by one man (i.e. Adam) sin entered the world". Based on this, we can conclude that Eve's spirit wasn't created separately but is in Adam.

Also,it is written that God finished creating on the seventh day ( Genesis 2:2). This implies that the offspring of our progenitors, Adam and Eve, has their spirit at the instance of their conception. Hence,our spirit wasn't created separately but is in Adam. This explains why it is said that "through one transgression there resulted condemnation to all men"( Romans 5:18).

" He [ God] made every nation out from one [Greek: ek henos] to dwell upon all the face of the earth,having determined their appointed times and the boundaries of their habitation " ( Acts 17:26)

Although the human spirit is pre-existing in some form in Adam, it is only functional if it is united with the body it's prepared beforehand to enliven ( Job 33:4,Psalm 139:13, Acts 17:26 compare to Romans 5:18 to Genesis 2).

If you define personhood as "having a soul" then you've already lost because it is then necessary to define such impossible notions as "what is a soul". If you then define a "soul" as something that is distinct from a body now you have several problems. Either the soul has always existed (which creates theological difficulties) or it is a separate creative act from biological conception and now you're stuck trying to correlate these creative acts temporally. If you say "at conception" then what about identical multiples where the embryo divides after conception? Does the "soul" then divide accordingly also? If there's any possibility of "some time after conception" then you've opened the door to abortion being acceptable on a technicality.

There is something fundamentally broken with the idea that our "soul" is a separate thing from our "body", or even worse that we have "soul", "spirit" and "body" which is also a common theme where "biological life" is categorized as a separate thing from physical matter. These are all artificial divisions of our "person" and serve only to complicate and confuse.

The best explanation for this I've read to date is: http://www.scribd.com/doc/75080212/The-Six-Dawns-by-Dr-Alexander-Kalomiros

The person is a mystery: the mystery of the divine seal upon the earthen human nature. The mysteries are not familiar to man. But the pagan meaning of the soul held no mystery: a different nature is intertwined and coexists with material nature. It is the spirit that becomes intertwined with matter. The body dies and the material nature dissolves, but the spirit remains as a second, independent nature. These are very easy things for the rationalistic mind to grasp. Thus, for some Christians the meaning of the word soul slowly regained the ancient pagan meaning, and man, at least in the people's mind, became compounded of two natures. In this way, a spiritual nature of its own was imputed to the personality of man that remains after the body has dissolved. This means, of course, a clear return to paganism. In this conception, man's person is preserved after death because it has its own independent existence and nature, and not because it remains "in the hand of God", in the knowledge of God which is true existence and is also completely dependent on God. An immortality of this kind, therefore, would be of the same nature as the immortality of God. And even if it were believed to be given by God, in the final analysis, it would be self-sufficient and independent. God, of course, could have given such an immortality outright; it would have been a gift from God by grace. But if it were given, from that moment man would have perceived it as his own natural possession, in other words, as a second nature in man. Thus, he would believe he is compounded of two natures, of mortal matter and immortal spirit.

Regardless of whether you actually wanted a Biblical Answer, (there was a christian-thermodynamics tag until it got nuked) here is the answer, from the undisputed captain of answers like these St. Thomas Aquinas:

The human soul, by reason of its perfection, is not a form merged in matter, or entirely embraced by matter. Therefore there is nothing to prevent some power thereof not being the act of the body, although the soul is essentially the form of the body.

Summa Theologica - Part 1 - Question 76 - Article 2 - Reply to Objection 4

So, it's really the premise of the questions that is wrong, as far as theology is concerned, the soul exists outside of time, the body is matter. The soul exists outside of time, it is not matter and yet it has no corollary in quantum physics.

If the soul has always existed, it was predetermined to haunt a particular carcass the moment the soul enters the body is irrelevant because, just as the embryo was meant to develop into the child, the soul was meant to conform to that same matter.

The human soul, however is a created thing and it is created along with the body

If the soul by its nature were a complete species, so that it might be created as to itself, this reason would prove that the soul was created by itself in the beginning. But as the soul is naturally the form of the body, it was necessarily created, not separately, but in the body.

Summa Theologica - Part 1 - Question 90 - Article 2 - Reply to Objection 1

But clearly, and this is the point I'm trying to make, without becoming Origen and handing in my Catholicism Badge, is that somewhere, God has a plan for sex. The plan is to make babies who hopefully will worship Him forever and live with Him in Heaven. The plan shouldn't be confounded by human means.

But, to your question, there is no funnel which God pours the soul through into the human body. Aquinas says the soul merely takes the form of the human being as it exists.

To all this, I must add the pro-life mantra

Jeremiah 1:4-5 (NIV)
4 The word of the Lord came to me, saying,

5 “Before I formed you in the womb I knew[a] you, before you were born I set you apart; I appointed you as a prophet to the nations.”