How do we know the virgin birth doctrine is true?

The doctrine of the virgin birth is undergirded by prophetic Scripture, such as Isaiah 7:14, which states, 'A virgin shall conceive and bear a son'. This prophecy, confirmed in the New Testament in Matthew 1:23, outlines God's sovereign plan for redemption through Jesus Christ. The fulfillment of this prophecy manifests the divine orchestration behind the incarnation. Additionally, the theological necessity for Jesus to be born of a virgin relates to the requirement for Him to be sinless and capable of bearing the sin of the world. By being conceived by the Holy Spirit, Jesus escapes the sinful lineage of Adam and thus qualifies as the perfect sacrifice for sin.