If your teenage daughter or your fiancé told you she was pregnant but was still a virgin, would you believe her? For when a single person becomes pregnant, the evidence of sexually immoral conduct is highly probable. That’s because, beyond medically engineered fertilization, it’s impossible to get pregnant without sexual contact. There’s no other acceptable or reasonable explanation— unless, of course, you were Mary, Jesus’ mother.

A pure, young Jewish girl engaged to be married to Joseph, Mary—much to her confusion and distress—was told by an angel that she would “conceive and give birth to a son” (Luke 1:31). She understood the biological impossibility of the situation when she said, “How can this happen? I am a virgin” (Luke 1:34). A medical doctor would certainly have concurred! Joseph’s decision to break the engagement, albeit discreetly (Matthew 1:19), revealed that he didn’t believe her explanation of a divine conception either (Luke 1:35). It required another angelic visitation to convince him otherwise (Matthew 1:20-21).

It’s possible today for a woman, a virgin even, to become pregnant by artificial insemination or the controversial embryo transfer. But Luke, who was a medical doctor himself (Colossians 4:14), documented the world’s first and only virgin conception of a pregnancy— the conception of a human life without fertilization from the human male (Luke 1:34-35). Human parthenogenesis is scientifically impossible even today. But nothing is impossible with God (Luke 1:37).

To the nonbelieving world, the virgin birth of Jesus is a scientific mockery. But for Christians, it’s a miraculous necessity—a sign from God. For in it, He fulfilled His 700-year-old promise (Isaiah 7:14). Mary’s baby boy was called “the Son of the Most High” (Luke 1:32). And she named Him Jesus (Luke 1:31), for He came to “save His people from their sins” (Matthew 1:21).

NLT 365-day reading plan passage for today: 1 Samuel 14:1-23