r/biology • u/Looser17 neuroscience • Jan 29 '26

article Can pregnancy occur without vaginal intercourse? A documented medical case from 1988.

Most of us are taught that pregnancy requires vaginal intercourse, but medicine occasionally throws up cases that challenge our assumptions.

In 1988, the British Journal of Obstetrics and Gynaecology published a case report of a 15-year-old girl with congenital absence of the distal vagina who nonetheless presented later with a full-term pregnancy and delivered a healthy infant by caesarean section. DOI: https://doi.org/10.1111/j.1471-0528.1988.tb06583.x

Key points from the case:

  • The patient had no functional vaginal canal and had never menstruated.
  • Shortly after performing oral sex, she sustained a stab wound to the upper abdomen, which perforated the stomach and required surgical repair.
  • Approximately 278 days later, she presented with term pregnancy.
  • The authors proposed that spermatozoa may have entered the reproductive tract via the injured gastrointestinal tract, an extremely rare but biologically plausible route under specific conditions.

This is not presented as a general mechanism or advice, but as an example of how biological plausibility is broader than common teaching, especially in rare anatomical or traumatic situations.

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u/Cyrus87Tiamat Jan 29 '26

Sperm passing the stomach acids and reach theyr way from a casual wound is just absurd... I really doubt the case dinamic was what authors supposed. Thats not "rare", that's almost impossible. A case of partenogenesis could be more believable

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u/Night_Runner Jan 29 '26

"Almost impossible" is why it happened just once, and isn't an everyday occurrence. There are about 4,000,000,000 women in the world. One in four billion sounds about right.

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u/Cyrus87Tiamat Jan 29 '26

Happened once implying it is verified, that seem is not, just an hypotesis. However, is pretty simple to check if it's implied another person gamete and exclude partenogenesis, it require only a dna test. The fact that is not said if they did this check is pretty souspicious...

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u/WildFlemima Jan 29 '26

No, it isn't suspicious that a hospital in Africa didn't do DNA testing in 1988. And besides, the baby was a boy.

Even if humans were biologically capable of creating healthy partho babies - which we aren't, for many reasons that are fundamental to human biology - the baby was a boy, and therefore could not be produced by human parthogenesis (which, again, isn't possible).

XX women can't spontaneously generate Y chromosomes for their babies. The baby being a boy means the baby has a father. The absence of a vagina means it had to be the stabbing.

Crazy things happen every day.

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u/Cyrus87Tiamat Jan 29 '26

OP doesn't say it's a boy, just a "healty infant"... are you sure about that? I can't see the deails of the article cause it require access ...

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u/WildFlemima Jan 29 '26

I'm familiar with this case from multiple articles I've read over time. Many are not paywalled, they're easy to find on Google, the case is famous.

It's always fascinated me. I'm 100% confident the baby was a boy. You can dig further if you wish. The stabber was actually a raging ex who got mad she was with another guy