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It has long been thought that cycle length is associated with the moon. A 1979 study of 305 women found that approximately one-third of the subjects had lunar period cycles, i.e., a mean cycle length of 29.5 days plus or minus 1 day. Almost two-thirds of the subjects started their cycle in the brighter half of the lunar cycle, significantly more than would be expected by random distribution.[28] Another study found a statistically significant number of menstruations occurred around the new moon.[29]
TextA few studies in both humans [64] and other animals[65] have found that artificial light at night does influence the menstrual cycle in humans and the estrus cycle in mice (cycles are more regular in the absence of artificial light at night). It has also been suggested that bright light exposure in the morning promotes more regular cycles.[66] One author has suggested that sensitivity of women's cycles to nightlighting is caused by nutritional deficiencies of certain vitamins and minerals.[67]
reply to post by mishigas
My Zodiac sign is Cancer, so my planet is the Moon, I was born on the day of the moon (Monday) on a full moon. Talk about bad luck. My emotions are always on a roller coaster ride.
The full Moon about drives me nuts with too much energy.