What is the ruling on divorce if bleeding occurs, which is not certainly menstruation, and does that affect the the validity of its occurrence?

If a divorce occurs while there is blood after intercourse, it does not take effect. If the blood is menstrual, then it is a divorce during menstruation, and the preponderant opinion is that it does not take effect. If it is not menstrual blood, then it is a divorce during a period of purity in which her husband had intercourse with her, and the preponderant opinion is that this type of divorce does not take effect. Divorce only takes effect if it occurs during a period of purity in which no intercourse has taken place.