Is a woman's prayer considered valid if she performs ghusl after her period is delayed and a sticky, blood-tinged fluid is discharged intermittently, then this fluid resumes discharge for consecutive days after the ghusl?

This blood is menstruation as long as it occurs within a period that can be considered menstruation. It is obligatory to abstain from prayer, fasting, and all other acts from which a menstruating woman must refrain until she sees purity, indicated by one of its two signs (dryness or the white discharge). The delay of blood from its usual time has no effect because there is no limit to the maximum period of purity between two menstruations. The maximum age for menstruation is fifty or sixty years according to some scholars. When she sees purity, she must perform ghusl (definition) (ritual bath). If the blood returns during the period of menstruation, she reverts to being in a state of menstruation. Her prayers performed during the intervening period of purity are valid.