The ruling on the fasting of a woman who is uncertain whether her bleeding is menstruation or irregular bleeding

Question:
She has another question. She says that she gave birth to a child last year, and the post-natal bleeding continued with her for more than forty days. Her first period after the post-natal bleeding was on the fourteenth of Ramadan, and it continued until Shawwal, but it was more like irregular bleeding than a monthly period. She says: I did not break my fast for a single day because I was uncertain that it was irregular bleeding. Do I have to make up the days I fasted in Ramadan, given that I did not break my fast?

Answer:
This requires knowing the nature of the blood. If it is irregular bleeding, she may fast, provided that fasting does not harm her; she should fast. However, if it is menstruation or post-natal bleeding, a menstruating woman does not fast, and likewise a woman with post-natal bleeding does not fast. Her fasting is not valid; if she fasted, her fasting would not be valid. Yes.