Do you have a reference for all 227 being men? According to Wikipedia ~6-8% of Parliamentary lawmakers are women. It's certainly possible all 227 were men out of the 290 total; but one's sex doesn't necessarily dictate one's politics.
Plus, I was legitimately curious.
It's a patriarchal society. Iran is ranked 140 out of 144 for gender parity and things only got worst for women there in recent years.