Bird Pinkerton

So in mice, they'll breed female mice with these special males so that some of their fetuses can create cells that fluoresce.

It's like a glow-in-the-dark feature.

And then the researchers can sort of dissect the mice or use machines to sort of track these glow-in-the-dark mouse fetus cells as they move through the mouse parent body.

Which is cool.

That's cool.

And again, something like that could also be happening in other mammals, including humans.

So it's not just sort of like C-section scars, healing injuries.

There's also been some research on how these cells that the parent gets from their fetus could potentially help with heart health.

So this is in mice, but it would actually help explain a phenomenon that doctors have seen in humans, which is basically like a lot of pregnant people develop heart issues.

So your heart is actually doing like a huge workout during pregnancy.

This will be no surprise to you.

But, you know, it's pumping a lot of blood.

There's just like more of you and your body is working a lot harder.

And so researchers have actually compared it to athletes who do long distance sports.

But because the heart is doing this, this sort of nine-month-long workout, it makes sense that a lot of pregnant people develop problems with their heart during this time.

What's interesting is that sometimes these problems just kind of fix themselves.

Like, they go away and researchers aren't totally sure why.

And some are wondering if the cells from the fetus actually help fix things.

Like, if the cells from the fetus are traveling to the heart and giving it some kind of—

boost that could explain the sort of heart healing that is happening here.