Is a woman's ghusl valid if she delayed it due to illness, and performed ghusl on the tenth day without ihtisha' (stuffing/plugging), knowing that she had become pure and nothing had been discharged from her?

If the bleeding stops and is followed by yellow or brownish discharges on the seventh day, ghusl (definition) (ritual bath) becomes obligatory for prayer, unless illness prevents it, in which case tayammum (definition) (dry ablution) should be performed. Once purity is confirmed, it is not necessary to use a cotton swab for internal examination. However, in cases of doubt, internal examination with a cotton swab is necessary to confirm purity, especially if the sign of purity is dryness (jufuf) and not the white discharge (al-qassah al-bayda'), because dryness is confirmed by passing a tissue to ensure it is free of blood, yellowness, or brownish discharge.