A woman with post-natal bleeding fasts, prays, and performs Hajj if she becomes pure before forty days

Question: Is it permissible for a woman with post-natal bleeding to fast, pray, and perform Hajj before forty days if she becomes pure?

Answer: Yes, it is permissible for her to fast, pray, perform Hajj, and perform 'Umrah, and it is permissible for her husband to have intercourse with her within the forty days if she becomes pure. So if she becomes pure after twenty days, she takes a bath, prays, fasts, and it becomes permissible for her husband. What is narrated from 'Uthman ibn Abi al-'As that he disliked it is understood as a dislike of disapproval (makruh tanzih), and it is his independent legal reasoning (ijtihad), may Allah have mercy on him and be pleased with him, and there is no evidence for it.
The correct view is that there is no harm in that if she becomes pure before forty days, for her purity is valid. If the blood returns to her within the forty days, the correct view is that she considers it post-natal bleeding, but her past fasting during the state of purity, her prayer, and her Hajj are all valid; nothing of that is repeated, as long as it occurred during purity.