Hawzah News Agency – Is a menstruating woman who becomes junub or a junub woman who starts her monthly period obliged to perform both ghusls after she becomes clean? Or if a janābah state occurs during menstruation, would not ghusl of janābah be obligatory for her due to the fact that she was not clean when janābah occurs?

A: In both cases, ghusl for janābah is obligatory for her in addition to ghusl of menses, but practically it is permissible to perform only ghusl of janābah, although caution lies in making intention to perform both ghusls while doing one ghusl.

Source: https://www.leader.ir/en/book/32/Practical-Laws-of-Islam