Look at the next scripture:
Luke 2:40 There the child grew up healthy and strong. He was filled with wisdom, and God’s favor was on him.
Jesus grew just like any ordinary child would grow because he had an earthly body. However, he grew up healthy, strong, filled with wisdom, and God’s favor on him! For he was not only Mary’s and Joseph’s son, but he was God’s son. Born of God’s seed!
Matthew 1:23 “A virgin shall be with child, and will bear a Son, and they shall call His name Immanuel,” which is interpreted, “God with us.”
Jesus didn’t just have an earthly body; he had a spiritual body. He was not the seed of man but the Holy Spirit Fathered Jesus! Mary carried God’s seed in her womb!