On the occasion of Imam Hasan b. Ali’s (a.s.) birth, Asma b. Umays narrates – I said – O Prophet of Allah, surely I am yet to see in her blood of menses and childbirth. He (s.a.w.a.) replied – Don’t you know my daughter Faatemah is pure and purified. Blood of menses and childbirth are never apparent in her.
Zakhaaer al-Uqba p 44