Is it permissible for a woman who suffers from irregular discharges (like the mustahadah) and fears missing the 'Asr prayer time due to her studies to combine the Dhuhr and 'Asr prayers with jam' taqdim?

It is permissible for a woman experiencing irregular bleeding (istihada) to combine two prayers due to the excuse of istihada. There is no harm in acting upon this opinion to alleviate hardship and remove difficulty.