PATHOLOGY

Detailed explanation-1: -These run with around 29.5 days (circalunar rhythms/clocks) or 14.75 days (circasemilunar rhythms/clocks) (see Figure 1A). The moon also generates rhythms with shorter period length of 12.4 and 24.8 h, so-called circatidal and circalunidian rhythms, respectively (1–5).

Detailed explanation-2: -Circadian rhythm is the 24-hour internal clock in our brain that regulates cycles of alertness and sleepiness by responding to light changes in our environment. Our physiology and behavior are shaped by the Earth’s rotation around its axis.

Detailed explanation-3: -The infradian rhythm is a 28-day clock that starts with the first menstruation at puberty and ends with the last menstruation before menopause, thus impacting women for almost half of their lives. The infradian rhythm has 4 different phases, each bringing important fluctuations in women’s bodies and brains.