Dr. Louise Newson

They wouldn't be able to make money from it.

Absolutely.

But if you think, a very simplistic example is carbon.

So carbon, everyone hopefully knows the periodic table, carbon is an element.

And if it's bonded in a certain way, it will make a graphite pencil.

So the graphite pencil lead, which we know is quite soft and crumbly.

If you add just one more bond, so there's four bonds instead of three, it turns into diamond, which is, you know, the hardest substance.

Very different.

So it's beautiful to look at.

But it only contains carbon.

But they're not just altering it by a bond.

They're adding a bit of maybe some oxygen, hydrogen, something else.

So the oestrogen, instead of being oestradiol, it's ethanol oestradiol.

So it has an ethanol group.

It's a whole group that's attached to it.

And the same with the synthetic progestogens.

They all have different chemical structures.

So if you see them, every so often I show them on my Instagram, they're complete.

If you did spot the difference, you would see that they are different.

And so they then did all their experiments early on on the womb because they wanted to stop bleeding.