this post was submitted on 05 Jul 2025
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Quest to create viable human sex cells in lab progressing rapidly, with huge implications for reproduction

Scientists are just a few years from creating viable human sex cells in the lab, according to an internationally renowned pioneer of the field, who says the advance could open up biology-defying possibilities for reproduction.

Speaking to the Guardian, Prof Katsuhiko Hayashi, a developmental geneticist at the University of Osaka, said rapid progress is being made towards being able to transform adult skin or blood cells into eggs and sperm, a feat of genetic conjury known as in-vitro gametogenesis (IVG).

His own lab is about seven years away from the milestone, he predicts. Other frontrunners include a team at the University of Kyoto and a California-based startup, Conception Biosciences, whose Silicon Valley backers include the OpenAI founder, Sam Altman and whose CEO told the Guardian that growing eggs in the lab “might be the best tool we have to reverse population decline” and could pave the way for human gene editing.

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[–] _chris@lemmy.world 4 points 2 hours ago

Aha. So that's why they don't care if everyone but the billionaires die.

[–] Nastybutler@lemmy.world 2 points 5 hours ago
[–] School_Lunch@lemmy.world 38 points 9 hours ago (3 children)

I'll never understand people who complain about population decline. It's a good thing. There are too many people here already. My thought on reading the headline was that it could be used in a different way. Everyone could be voluntarily sterilized, and then when they are ready and willing to have a kid they could use this new method to produce sex cells. No more unwanted pregnancies.

[–] Mediocre_Bard@lemmy.world 70 points 9 hours ago (2 children)

Population decline is not a problem for humanity. It is a problem for capitalism.

[–] shalafi@lemmy.world 4 points 1 hour ago

Depopulation is a problem for any economic system. You can't run any form of government or economy when young workers aren't contributing to the tax base and the aging population requires more and more care.

Sure as clockwork someone will come along and say tax the rich. That only works for so long in this scenario. The rich get rich off our backs. No backs, no rich.

[–] DeathsEmbrace@lemmy.world 6 points 5 hours ago* (last edited 5 hours ago)

Even worse they're probably looking at the projection and seeing a loss of revenue directly related to population rates. They want more sheep to feed their money making systems.

[–] 4am@lemmy.zip 1 points 8 hours ago (1 children)

Yes, that sounds like a wonderful idea. Let’s put the reproductive future of the species under commercial and/or governmental control.

Both of those things are demonstrably trustworthy, especially in the last decade.

We should cede all control to them. Indeed.

(/s)

Are you a young naive tech bro, or a Nazi Eugenicist? Is there a difference anymore? Have you even thought about what you are saying? That’s an insane take.

[–] School_Lunch@lemmy.world 14 points 8 hours ago

Um I never said anything about giving control to anyone... in fact I specifically said "voluntarily"... you seem like an angry person who is looking for things to be mad about. I'm not sure how you jumped to calling me a nazi.

I have thought about what I'm saying, have you? Unwanted pregnancies are something that by definition nobody wants. All I said was that this could be a way to address that, and you took that simple idea and ran to crazy town with it.

[–] Erasmus@lemmy.world 8 points 7 hours ago (1 children)

Blade Runner and 40k have entered the chat.

[–] Hamartiogonic@sopuli.xyz 3 points 6 hours ago

And Starwars

Kaminoan meme

[–] Scott_of_the_Arctic@lemmy.world 1 points 4 hours ago

I'm going to be the first to eat a Homan omelette.

[–] Mothra@mander.xyz 18 points 10 hours ago (2 children)

Ah yes great I feel at ease now, knowing Sam Altman gives the thumbs up to this

That little voice telling me this is a very sharp double edged sword probably doesn't know shit

[–] iAvicenna@lemmy.world 4 points 4 hours ago

I read five lines into the news and thought "oh well shoot, now billionaires are going to try reverse the population decline due to the shitty world they created so that they can continue to generate labour and revenue and make the rest of us fight for resources in an over crowded world". And what do you know Sam Altman was the first shit face to confirm my speculations.

[–] SGGeorwell@lemmy.world 6 points 9 hours ago

There are so many double-edged swords lying around these days I feel like it’ll be death by a thousand cuts from double-edged swords.

[–] vane@lemmy.world 4 points 8 hours ago* (last edited 8 hours ago) (1 children)

They are going after Hitler wet dream to create super human.

[–] GrumpyDuckling@sh.itjust.works 3 points 8 hours ago

babies they can sell into slavery.

[–] Dr_Box@lemmy.world 5 points 9 hours ago* (last edited 9 hours ago) (1 children)

Isnt this just cloning? Like if they grew sperm cells and eggs from my dandruff and combined them

[–] RotSteinFinke@feddit.org 5 points 7 hours ago* (last edited 7 hours ago) (1 children)

No, it is something different. Cloning creates a another being with the exact same DNA. This would allow people, who can't produce viable sperm/egg cells, to reproduce with their partner. First patients would be infertile men and women.

[–] Breadhax0r@lemmy.world 1 points 5 hours ago (1 children)

Would a sperm/egg combo from the same person not be a clone?

[–] RotSteinFinke@feddit.org 3 points 3 hours ago

The sperm and the egg would contain different copies of the chromosomes. The cell randomly divides its chromosomes when it becomes an egg or sperm. When they merge, two halves of a genome form a full one again. But some chromosomes would be there as doubles, others would be lost. The effect would be the same as incest. Mutations that would be hidden in a healthy cell would emerge.

[–] lemmie689@lemmy.sdf.org 3 points 9 hours ago

You are a true believer. Blessings of the state, blessings of the masses. Thou art a subject of the divine. Created in the image of man, by the masses, for the masses. Let us be thankful we have an occupation to fill. Work hard; increase production, prevent accidents, and be happy.