Scientists program stem cells to mimic first days of embryonic development
11 comments
·March 21, 2025gnabgib
Why the title edit? (Should be: Scientists program stem cells to mimic first days of embryonic development)
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StemCells
fixed it
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cycling
Do these synthetic embryos become an animal?
47282847
If you find yourself drawn to embryonic development, a great resource is https://www.embryo.nl/
amelius
> Were you also brought up with the myth of that one super sperm that ‘fertilizes’ an egg?
> Then I have ‘bad news’. The story is completely outdated. A few dozen, sometimes hundreds of sperm cells enter into a biological conversation with an egg. It is about exchanging with each other, in order to eventually merge. Penetration is not the word for what is happening here. Call it a cellular mating dance.
This is clearly nonsense as IVF works fine.
SapporoChris
Poor argument I think. INV involves tens of thousand of sperm. However, I'm saying I agree with the grandparent.
https://en.wikipedia.org/wiki/In_vitro_fertilisation#Co-incu... The sperm and the egg are incubated together at a ratio of about 75,000:1 in a culture media in order for the actual fertilization to take place.
amelius
> In certain situations, such as low sperm count or motility, a single sperm may be injected directly into the egg using intracytoplasmic sperm injection (ICSI).
cycling
How much is the efficiency or success rate of ivf embryos?
Here is the source paper, pretty cool: https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(25)0...