Purity: Making Up Prayers and Fasts
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 459:
A woman does not have to make up those prayers that she did not perform while she was in the state of ḥayḍ; however, she does have to make up those fasts of the month of Ramadan that she did not keep while she was in the state of ḥayḍ. Similarly, based on obligatory precaution, she must make up any fasts that were obligatory for her at a particular time on account of a vow and which she did not keep while she was in the state of ḥayḍ.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)