Is it permissible for the unclassifiable intersex person, who is a male born with a uterus and breasts and who menstruates, to pray and fast while menstruating? And is it permissible for him to wear a bra to reduce the size of his breasts because they hinder him?

If a woman menstruates and has a uterus, she is definitively female, even if she has a penis or testicles. Ibn Hazm stated that menstruation, pregnancy, or urination from the vulva alone determines femininity. A specialist doctor reported that labial fusion can occur during pregnancy, leading to the assumption that the child is male, but the matter becomes clear at puberty with the onset of menstruation. Gender is determined by examining chromosomes (XX for female and XY for male), by performing analyses and ultrasounds, and by considering external appearance. Fasting and prayer are not permissible during menstruation.