The evolution of menstruation

[erratio]

http://www.quora.com/Menstruation/What-is-the-evolutionary-or-biological-purpose-of-having-periods

Kind of terrifying

Choice excerpts:

"Inside the uterus we have a thick layer of endometrial tissue, which contains only tiny blood vessels. The endometrium seals off our main blood supply from the newly implanted embryo. The growing placenta literally

Comments

[m_danson]

Never. Getting. Pregnant.

That sounds like a horror show.

[erratio]

Ditto. So so glad I already had no intention of giving birth.