Delayed menstruation basal body temperature will rise, mainly with the previous ovulation or not, if there is ovulation, after ovulation, the formation of the corpus luteum, stimulate the body temperature center, so that the basal body temperature rise 0.3-0.5 ℃, and this high temperature has been continued for at least 12 days or so. With the shrinkage of the corpus luteum, the basal body temperature will drop, and the menstruation will come when the basal body temperature drops for about 24 hours. If there is no ovulation in the case of delayed menstruation, the basal body temperature will not rise, because there is no corpus luteum formation, will not stimulate the temperature center, so the basal body temperature will rise, so delayed menstruation basal body temperature will rise, and there is no ovulation is directly related.