Should a girl perform ghusl after the cessation of menstrual bleeding or after the cessation of the yellowish discharge that follows it?

If the yellowish discharge is connected to blood, then it is menses. If a woman sees purity and then sees a yellowish discharge, it is not considered menses unless it occurs during her usual period.

If the yellowish discharge is considered menses (due to its connection with blood or its occurrence during her usual period), then the woman should not perform ghusl until it ceases.

However, if it is not considered menses, then the woman should perform ghusl as soon as she sees purity and disregard this yellowish discharge.