The D2 to D4 digit ratio is greater in self-reported females than in males, meaning D2 and D4 are more similar in length in females.

“It is the case that the D2 to D4 ratio is greater in self-reported females than it is in males. What does that mean? It means that digit D4 and D4 are more similar in length in females than in men males.”

“it's the D2, the index finger to the ring finger ratio is more similar in females than it is in males. In males, the index finger tends to be shorter.”

“And a guy named John Manning was reporting that there's a sex difference there, that it's that that ratio tends to be smaller in men than in women, and that it's present in children.”

“A sex difference in the body that's present before puberty. I know enough about sexual differentiation of the body, it's almost certainly due to prenatal testosterone.”

“And it turns out that that if you if you measure the length of the second digit, >> the pointer finger, the pointer finger >> for those just listening. Yeah. >> Right. And the the length of the ring finger and you can you can do a simple ratio. Divide the length of the second digit by the fourth digit so-called 2d4 ratio. And a guy named John Manning was reporting that there's a sex difference there, that it's that that ratio tends to be smaller in men”

“And there are some differences in uh in that statement according to sexual orientation that we'll get into.”