Woman, Life, Freedom – the chant behind Iran’s unprecedented months of protest.
Activists say 500 people have been killed and 20,000 arrested in a brutal crackdown that has, for now, quietened demonstrations.
Channel 4 News has been told many of the women detained face sexual abuse and torture.
In this exclusive report we speak to two women, whose identities we are not revealing for their protection, about what happened when the regime came for them.
And a warning his report contains highly distressing first hand testimony of torture.