In the name of Allah, the All-Merciful, the Mercy-Giving

All praise is due to Allah. Peace and blessings be upon Prophet Muhammad.

A menstruating woman is forbidden to perform Prayer or to observe fasting. According to the majority of scholars, she may not observe i`tikaf in the mosque. But still there are other acts of worship she can do whereby she can observe Laylat al-Qadr.

 

She may read the Quran without touching the mushaf (either from her memory or by wearing a glove or the like while holding it).

 

She can make supplications, do charity, ask for forgiveness and engage in other sorts of dhikr.

Allah Almighty knows best.