How do we know the virgin birth of Jesus is true?

The virgin birth is validated through fulfillment of Old Testament prophecies and the New Testament eyewitness accounts. As recorded in Luke 1:35, the divine announcement by Gabriel made it clear that Jesus' conception was not the result of human means but the work of the Holy Spirit. Furthermore, the Gospel narratives provide foundational accounts of Jesus' birth that affirm His unique nature. The fulfillment of these prophecies and the consistent testimony found in the Scriptures support the truth of the virgin birth within the historic Reformed framework, which acknowledges God's sovereignty in salvation history.