Rick , you asked about the idea that God supplies a spirit for each infant born.
The nature of the Bible is that it contains few expositions. Much of what can be gleaned from it must be gathered from matter-of-fact comments interspersed within its pages. This makes it difficult for us, because we never know whether this or that nugget hinges on a bad assumption of ours, or on a bad translation, or on a word that has since been co-opted into some new meaning.
Anyway, here are some nuggets that might support this idea.
Ecclesiastes 12:7 Then the dust will return to the earth as it was,
And the spirit will return to God who gave it.
++++(Without delving into all of this, notice that some of this happens “in my mother’s womb”  and some of it “in the lowest parts of the earth” .)++++
13 For You formed my inward parts;
You covered me in my mother’s womb.
14 I will praise You, for I am fearfully and wonderfully made;[b]
Marvelous are Your works,
And that my soul knows very well.
15 My frame was not hidden from You,
When I was made in secret,
And skillfully wrought in the lowest parts of the earth.
16 Your eyes saw my substance, being yet unformed.
And in Your book they all were written,
The days fashioned for me,
When as yet there were none of them.
Hebrews 12:9 Besides this, we have had earthly fathers who disciplined us and we respected them. Shall we not much more be subject to the Father of spirits and live?
Zechariah 12:1 The oracle of the word of the Lord concerning Israel: Thus declares the Lord, who stretched out the heavens and founded the earth and formed the spirit of man within him:
Psalm 71:20 You who have made me see many troubles and calamities will revive me again; from the depths of the earth you will bring me up ****again****.
There may be more such hints in the Bible, but I have spent several hours mining these (over the last couple of years), and I suspect that if there are more, there are not many—and they don’t make use of the words spirit, depths, formed, etc.