Discussion
The menstrual cycle of human female is the example of biorhythm known as :
Answer: C
The menstrual cycle is an Infradian rhythm.
Biological rhythms are classified by period. Infradian rhythms have a period longer than a day; the human menstrual cycle, about 28 days, is the standard example, along with seasonal breeding and hibernation.
Circadian rhythms have a period of about 24 hours, such as the sleep-wake cycle and the daily cortisol peak. Ultradian rhythms are shorter than a day, such as the 90-minute cycle of sleep stages or pulsatile hormone release. Tidal rhythms, of about 12.4 hours, are found in coastal animals that follow the tides.
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