The Human Nature of Christ is Proved by His: Conception in the Virgin's Womb
Source: TTT
Matthew 1:18
This is how the birth of Jesus Christ came about: His mother Mary was pledged in marriage to Joseph, but before they came together, she was found to be with child through the Holy Spirit.
Luke 1:31
Behold, you will conceive and give birth to a son, and you are to give Him the name Jesus.