Is the menstrual period during which a divorce occurred counted as one of the 'iddah periods for a woman divorced once?

It is forbidden for a husband to divorce his wife while she is menstruating, though the divorce is valid according to the majority of jurists. The menstrual period during which the divorce occurred does not count towards the 'iddah (waiting period); rather, the divorced woman observes an 'iddah of three subsequent menstrual periods. The Sunnah for one who divorced his wife while she was menstruating is to take her back until she becomes pure, then menstruates, then becomes pure again, then he may either keep her or divorce her. One should be cautious about divorce and avoid its causes.