Answered by Sayyidi Habib Umar bin Hafiz (may Allah protect him and benefit us by him)
What adhkar should a woman recite when she is menstruating?
She can recite all the adhkar that she would normally recite. She should recite verses of the Qur’an with the intention of protection, not recitation of the Qur’an. It may be preferable for her not to recite longer surahs such as Ya Sin and al-Mulk but it is also permissible for her to do so with the intention of protection.
Even if she does not read the adhkar that come before and after the prayer, she will be considered to have read them, just as she is considered to have prayed. However, the best thing is for her to read the adhkar which she customarily reads at the prayer times as if she was praying.
All of this will be a means for her to attain more light and a higher rank in the sight of Allah, the Almighty, the All-Forgiving.