Did you know that oestrogen induces beautiful ferning patterns in vaginal (and cervical) secretions?

[Lliam]

Could you imagine that a hormone, invisible and intangible, can imprint itself as a visible geometric pattern in a bodily secretion — turning endocrine signalling into crystallised biology?

🌟 Oestrogen induces ferning patterns in vaginal (and cervical) secretions because it… pic.twitter.com/8TK0Ux4wZO

— Rafael Sirera (@ProfSirera) December 23, 2025

Oestrogen upregulates ion transporters and aquaporins in the epithelial cells, increasing water content and ionic strength while simultaneously reducing viscosity.
The result is a fluid secretion optimised for sperm survival and transport. When such a secretion is spread thinly on a glass slide and allowed to dry, salt crystallisation dominates. Sodium and chloride ions self-organise as water evaporates, forming arborescent, fractal-like structures that resemble fern leaves.

Mind blowing image:
https://pbs.twimg.com/media/G81-VJaXsAAiJvs?format=jpg&name=small

Updates

6 mo

I like having my Johnson glazed with fractal patterns.

[Anonymous]

So thats where that wallpaper pattern came from! :O

[Anonymous]

I never knew that, very intriguing indeed.

[Opinion Owner]

Thanks for MHO

[sage2021]

So does this mean that if you get any on you and it dries, you could possibly get some little green ferns on you?🙃

[Lliam]

See my update. 😁

[NathanDavis]

can also happen in saliva... from males, lol

[exitseven]

This needs to be studied further. Nature does not do things by accident.

[Sevenpointfive]

it's funny that the crystallization is common and well known and has little to do with the oestrogen.

[AngryCarl2]

Who doesn't love a good fractal?

[Anonymous]

Hmmmm
That's not going to change my life🙂