Reason for mutahayyirah performing salaah as a precaution

Q: It is mentioned in a fatwa regarding a mutahayyara that if she is in doubt as to whether her haidh has ended or not, she will take ghusl for each salaah time and perform the salaah of the time. When the next salaah time comes, she will take ghusl and before performing the salaah of that time she will perform the last salaah again as a precaution" So what does it mean as a precaution perform the last salaah again. How is that being cautious?What are they being cautious of? 

A: The reason for caution is that there is the chance of her haidh ending after she took the ghusl in the last namaaz time.

And Allah Ta'ala (الله تعالى) knows best.

Answered by:

Mufti Ebrahim Salejee (Isipingo Beach)