What is "progesterex"

Progesterex is a fictitious date rape drug that would purportedly cause sterilization. It is part of a hoax that began to circulate in 1999 via e-mail on the internet. No actual drug by this name or even with these properties exists, and no such incident has ever been documented or confirmed. The most high profile person falling for the hoax was British MP Lynne Featherstone who asked a question about the fake drug in Parliament.