What is the ruling of a woman’s fasting if she does know whether she’s got her menstruation before or after…

Question

What is the ruling of a woman’s fasting if she does know whether she’s got her menstruation before or after the breakfasting time?

Ayatullah Bashir Hussain al-Najafi · Accepted Answer

In the name of Allah, her fasting is valid. Allah knows best.

Suggest a correction or extra detail