=== Månen ===
Selvom den gennemsnitlige længde på et menneskeligt menstruationscyklus svarer omtrent til [[månens faser|månens cyklus]], er der ingen egentlig forbindelse mellem de to.<ref>{{cite book|title=Vertebrate Endocrinology|date=2013|publisher=Academic Press|isbn=9780123964656|page=361|edition=5|url=https://books.google.ca/books?id=F_NaW1ZcSSAC&pg=PA361}}</ref> Forholdet menes at være et tilfælde.<ref>{{cite book|author1=William A. Gutsch|title=1001 things everyone should know about the universe|url=https://archive.org/details/1001thingseveryo0000guts|date=1997|publisher=Doubleday|location=New York|isbn=9780385482233|page=[https://archive.org/details/1001thingseveryo0000guts/page/57 57]|edition=1st}}</ref><ref>{{cite book|last1=Barash|first1=David P.|last2=Lipton|first2=Judith Eve|title=How women got their curves and other just-so stories evolutionary enigmas|date=2009|publisher=Columbia University Press|location=New York|isbn=9780231518390|edition=[Online-Ausg.].|url=https://books.google.ca/books?id=fZM2AAAAQBAJ&pg=PT64|chapter=Synchrony and Its Discontents}}</ref> At blive udsat for lys har ikke nogen påvirkning på menstruationscyklussen hos mennesker.<ref name=Kris2013/> En metaanalyse af studier fra 1996 viser ingen korrelation.<ref>Som citeret af Adams, Cecil, [http://www.straightdope.com/classics/a990924.html "What's the link between the moon and menstruation?"] {{Webarchive|url=https://web.archive.org/web/20080517150011/http://www.straightdope.com/classics/a990924.html |date=17. maj 2008 }} (accessed 6 June 2006):<br />{{cite book | last = Abell | first = George O.|author-link=George Ogden Abell |author2=Barry Singer | year = 1983 | title = Science and the Paranormal: Probing the Existence of the Supernatural | url = https://archive.org/details/scienceparanorma0000unse_y5v9 | publisher=Scribner Book Company|isbn = 0-684-17820-6}}</ref><ref>{{cite journal | author = Zimecki M | title = The lunar cycle: effects on human and animal behavior and physiology | journal = Postepy Hig Med Dosw (Online) | volume = 60 | pages = 1–7 | year = 2006 | pmid = 16407788 | url = http://journals.indexcopernicus.com/fulltxt.php?ICID=442883 | access-date =  7. juni 2016 | archive-date =  9. oktober 2009 | archive-url = https://web.archive.org/web/20091009184052/http://journals.indexcopernicus.com/fulltxt.php?ICID=442883 |url-status=dead }}</ref><ref name="kelly">{{Cite journal | last = Kelly | first = Ivan | last2 = Rotton | first2 = James | last3 = Culver | first3 = Roger | last4 = Simpson | first4 = Audric | year = 1986 | title = The Moon Was Full and Nothing Happened: A Review of Studies on the Moon and Human Behavior | journal = Skeptical Inquirer | volume = 10 | issue = 2 | pages = 129–43 | url =  }}. Reprinted in ''The Hundredth Monkey - and other paradigms of the paranormal'', edited by Kendrick Frazier, Prometheus Books. Revised and updated in ''The Outer Edge: Classic Investigations of the Paranormal'', redigeret af [[Joe Nickell]], [[Barry Karr]] og [[Tom Genoni]], 1996, [[CSICOP]].</ref>
Psykologi Samfund Sexologi Sikkerhed Naturvidenskab