JOHN  3 V 3 
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. 

The first birth is our physical birth. The second birth is our spiritual birth. 

JOHN  3 V 6 
That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. 

JOHN 3 V 7
Marvel not that I said unto thee, Ye must be born again. 

JOHN 3 V 8
The wind bloweth where it listeth, and thou hearest the sound thereof, but canst not tell whence it cometh, and whither it goeth: so is every one that is born of the Spirit. 

We are begotten of the spirit: because of the resurrection of Christ. 

1PET 1 V 3
Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead, 

We have previously shown, from other articles: that we receive the earnest of Gods Spirit; when we accept the death of Christ. We receive the Holy Spirit of life, when we believe and love the correct knowledge of God the Father and Christ 
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The following, and the previous scriptures show that we are begotten of God, when we receive the Holy Spirit of life. 

ROM 5 V 10
For if, when we were enemies, we were reconciled to God by the death of his Son, much more, being reconciled, we shall be saved by his life. 

1PET 1 V 3 
Blessed be the God and Father of our Lord Jesus Christ, which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead, 
 

We are called Sons of God, when we receive the Holy Spirit of life, even though we are begotten of God at this time and not yet born again. Just as an unborn child 

1JOHN 3 V 1 
Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not. 

1JOHN  3 V 2
Beloved, now are we the sons of God, and it doth not yet appear what we shall be: but we know that, when he shall appear, we shall be like him; for we shall see him as he is. 

God looks on us as a Son of God, when we are spiritually begotten, by receiving the Holy Spirit of life. God looks on us as a physical human being, from our conception. 

PSA  22 V 10 
I was cast upon thee from the womb: thou art my God from my mother's belly. 

The following two verses have born and begotten in the wrong places. 

JOHN 1 V 13
Which were born,[should be begotten] not of blood, nor of the will of the flesh, nor of the will of man, but of God. 

JOHN 1 V 14  And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten [should be born] of the Father,) full of grace and truth. 

John  1 V 12 helps clarify verses 13 &14. When we receive Christ, we have power to become sons of God. The earnest of the spirit gives us power to be come sons of God. When we receive the spirit of life; we are then sons of God. 

JOHN 1 V 12
But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:

It is clear that Jesus Christ is not the only begotten of the Father: He is the only Born of the Father. Verse 14 above is talking about the transfiguration of Christ, when he was seen in his spiritual glory. The glory of  Christ; as he was born of the Father. 

MARK  9 V 2 
And after six days Jesus taketh with him Peter, and James, and John, and leadeth them up into a high mountain apart by themselves: and he was transfigured before them. 

When we receive the earnest of the spirit: we have the power to become a Son of God. 

When we receive the Spirit of life: we become a Son of God. 

When we are resurrected to eternal life: we are born again.