
In many religions and cultures, women who are menstruating or who just gave birth are not allowed to enter sacred sites, such as temples, or participate in religious rituals. This is because they are often seen as ritually impure.
Early Christians cited menstruation as the reason for not allowing female deacons or priests. Modern Catholic teachings do not express this attitude directly, but some Catholic feminists argue that views of women’s blood pollution still influence the church’s position against women’s ordination.