Menu Close

If Jesus’ Mother Had a Paternity Test, What Would it Say?

joseph mary pregnancy

According to Evangelicals, Mary, the mother of Jesus, was impregnated by the Holy Ghost and nine months later gave birth to a God-man named Jesus Christ. In any other setting, believing such things would, at the very least, result in you being labeled a nutjob. But because it’s a religious belief, everyone is supposed to accept it without question. Or, at the very least, not criticize or ridicule said belief.

The Bible says:

And in the sixth month the angel Gabriel was sent from God unto a city of Galilee, named Nazareth, To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin’s name was Mary. And the angel came in unto her, and said, Hail, thou that art highly favoured, the Lord is with thee: blessed art thou among women. And when she saw him, she was troubled at his saying, and cast in her mind what manner of salutation this should be. And the angel said unto her, Fear not, Mary: for thou hast found favour with God. And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name Jesus. He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end. Then said Mary unto the angel, How shall this be, seeing I know not a man? And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God. (Luke 1:26-35)


Now the birth of Jesus Christ was on this wise: When as his mother Mary was espoused to Joseph, before they came together, she was found with child of the Holy Ghost. Then Joseph her husband, being a just man, and not willing to make her a public example, was minded to put her away privily. But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost. And she shall bring forth a son, and thou shalt call his name Jesus: for he shall save his people from their sins. Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying, Behold, a virgin shall be with child, and shall bring forth a son, and they shall call his name Emmanuel, which being interpreted is, God with us. Then Joseph being raised from sleep did as the angel of the Lord had bidden him, and took unto him his wife: And knew her not till she had brought forth her firstborn son: and he called his name Jesus. (Matthew 1:19-25)

According to the Bible, Mary was engaged to a man by the name of Joseph. Prior to their marriage, Mary found out that she was pregnant. If we take the Bible at face value, Joseph hadn’t had sex with Mary. Wanting to make an honest woman out of Mary, Joseph married her. If he had not done so, Mary could have been stoned for committing adultery.

The aforementioned texts mention one of the most absurd things in the Bible: a virgin having a child. Human birth requires a fertilized egg, and the fertilization process requires sperm from a man. No sperm, no Jesus. Yet, Evangelicals ask us to suspend reason and believe that Mary was in some way impregnated by a non-human — the third part of the Trinity, the Holy Ghost. Wouldn’t this make for an awesome story on the SyFy Channel? Woman Becomes Pregnant Without Having Sex! There is no evidence for this claim outside of the Bible. We are expected to believe that Mary, a virgin, became pregnant through some sort conjugal union between her and the Spirit of God. How did this happen? Was Mary a willing participant? If not, does this mean the Holy Ghost raped Mary?

Of course, when you believe your God works miracles, anything is possible. Nothing is too hard for God, including inseminating a young virgin without the benefit of male sperm and DNA. Anyone with a modicum of scientific understanding knows Jesus’ birth story is preposterous. The logical explanation is that Mary had sex with a man and became pregnant. That’s how it has worked from Day One. Either Joseph was Jesus’ biological father or some other man was. It’s either that or you believe God had sex with Mary and impregnated her.

Imagine if Mary asked for a paternity test. What would the test say? Who would it name as the father of Jesus? Joseph? Or maybe Bob? One thing is for certain, the test would not list the Holy Ghost as Jesus’ father.

This story, along with numerous others, was partially instrumental in my defection from Christianity. Either I believe what science tells me about where babies come from, or I suspend all reason, skepticism, and intellectual inquiry and believe God is the lime, Mary is the coconut, and when shaken, out comes Jesus. I’m sorry, but I simply cannot and will not believe such nonsense.

About Bruce Gerencser

Bruce Gerencser, 61, lives in rural Northwest Ohio with his wife of 40 years. He and his wife have six grown children and twelve grandchildren. Bruce pastored Evangelical churches for twenty-five years in Ohio, Texas, and Michigan. Bruce left the ministry in 2005, and in 2008 he left Christianity. Bruce is now a humanist and an atheist. For more information about Bruce, please read the About page.

Bruce is a local photography business owner, operating Defiance County Photo out of his home. If you live in Northwest Ohio and would like to hire Bruce, please email him.

Thank you for reading this post. Please share your thoughts in the comment section. If you are a first-time commenter, please read the commenting policy before wowing readers with your words. All first-time comments are moderated. If you would like to contact Bruce directly, please use the contact form to do so.

Donations are always appreciated. Donations on a monthly basis can be made through Patreon. One-time donations can be made through PayPal.


  1. Avatar
    Karen the rock whisperer

    I think you’re being unfair to the biblical authors. Virgin births were A Thing at the time, and most self-respecting gods contrived to have one. What were they to do? They were competing with an impressive Pagan pantheon.

  2. Avatar

    Everyone who was anyone was “born of a virgin” or was a “son of a God” in that era.

    But yes, I do agree that it is ridiculous, and millions believe it without question because RELIGION.

  3. Avatar

    If there was a blood sample from the crucifixion site tested in two independent laboratories, both results showing chromosome count equal to 24, would you consider that a scientific verification? Let’s say it’s not a proof that God was Jesus’ father, but it would at least prove that he didn’t have a human father or that he had some very rare disease.

  4. Avatar

    Clearly you appreciate the practical problems there’d be surrounding any such test, so what you are proposing is a thought experiment. So, okay, you’ve got your blood sample and you know for certain that it comes from the person known as Jesus. It’s tested and it is found to have 24 chromosomes. That suggests abnormality, but I have no idea how abnormal. As you say you aren’t even on the starting blocks of proving he was god, or in any way related.

    Of course, to reach this point you’d have had to prove that Jesus actually existed, and it’s becoming increasingly difficult to argue this with any certainty.

    • Avatar

      History is all about probabilities. A lot of what Bruce is doing is connected to exposing ideology and agenda-driven fundamentalism. In my experience, those who try to deny Jesus’ existence are as agenda-driven as zealot Christians. Bruce recommends Ehrman’s books a lot. Given the historical methods and sources we have it is highly highly probable Jesus existed. Even though Ehrman is an agnostic/atheist and former fundamentalist, he is sure (to the degree historical methods allow us) Jesus existed. So if people want to use his work to debunk fundamentalist ideology it would at least be fair to admit this side of him as well. I, personally, don’t need to deny Jesus’ existence to be able to retain the persuasion that religion does many extremely harmful things – and reject them.

      Sure, I am interested in practical problems regarding Jesus and all the research connected to this. Learning about textual criticism and historical methods has been a great benefit on this journey. For example, learning that authors of the gospels were already shaping Jesus to fit their views, modifying the sources; scribes modifying the texts they copied to insert misogynist and anti-Semitic stuff, etc. Maybe Jesus wasn’t a manipulative dickhead. It seems he didn’t even preach heaven and hell the way religion has for centuries and centuries to scare the crap out of people. Maybe he was nice guy. If that’s the case, I want to find out…

  5. Avatar
    Julie S.

    I would call the virgin birth a “miracle” just like the other “miracles” mentioned in the Bible. We all know there are logical explanations to these so-called extraordinary events.

  6. Avatar

    Of course I buy into the story “borrowed from other beliefs and cultures”. But what I saw interesting th the passages you included were this:
    A. And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name Jesus. He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David (so David was Jesus father)
    B. But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost. (so Joseph was the son of David)
    Conclusion: Jesus and Joseph were Brothers! Never heard that from any IFB pulpit!

  7. Avatar

    I recall being told at church in the 1980s that God used Mary’s DNA alone to create Jesus, and that Jesus’s spirit/soul was added to the biological mix. They didn’t explain how the resulting child that was 100% composed of Mary’s DNA would have been male though…..

  8. Avatar
    Dave Dubya

    I know it’s a sin to ask questions, but I can’t help but wonder. Who first reported Gabriel’s visit to Mary, anyway? Did she document this? There’s no evidence of this, for some reason.

    Did Mary tell her husband that he was talking in his sleep to a guy named Gabriel?

    Perhaps this was all a ruse to conceal the identity of Gabe Jr.’s father? Or was God the lustful adulterer? Perhaps he was feeling guilty for ordering the deaths of so many children?

    Either way, science and history are out of the question.

    I report, you decide.

    • Avatar
      Bruce Gerencser

      Quoting the Bible doesn’t make it so.

      You do know “virgin” can also be translated “young woman,” right?

      I am an Evangelical pastor-turned-atheist. Want to convince me? You are going to have to do better than quoting the Bible. Proof-texting is a terrible argument for, well for anything.

Want to Respond to Bruce? Fire Away! If You Are a First Time Commenter, Please Read the Comment Policy Located at the Top of the Page.

Bruce Gerencser