But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law, To redeem them that were under the law, that we might receive the adoption of sons. Galatians 4:4-5
As we continue to look at the Virgin Birth of Christ, we see what the Apostle Paul taught. Without the birth of Christ, there is no atonement for your sin. Without the atonement of your sin, there is no salvation. As the scripture says when the fulness or completion of the time has come. The virgin birth is the completion of the coming of the Messiah.
Made or Born of a woman, made or born under The Law. Its important to note Jesus was born of a virgin because he was born sinless. And he remained sinless his entire life so he can become the atonement for our sin.
To redeem us that were under the Law, Christ kept The Law perfectly (Matthew 5:17) so we can be made perfect before our Heavenly Father. This is a fact many misunderstand, The Law which is impossible for us to complete, was completed for us by Christ. Why did Jesus do this and that during his ministry, because he was fulfilling The Law for those who abide in Him
Because of the blood of Christ, because of his finished works at the cross, because of the baptism of the Holy Spirit, we are made children of God. None of this is possible without the Birth of Christ, which is why the Virgin Birth is a significant event.