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Do lunar cycles influence in vitro fertilization results?

Zusammenfassung: Faktoren für saisonale Änderungen in IVF-Parametern scheinen sehr komplex. Die Mondphase könnte einer dieser Faktoren sein.

J Assist Reprod Genet. 2002 Nov;19(11):539-40.

Weigert M, Kaali SG, Kulin S, Feichtinger W.

PURPOSE: Our objective was to investigate the lunar influence on IVF-ET outcomes.

METHODS: Between 1992 and 1999 we have completed 7572 preprogrammed IVF-ET treatment cycles with the same stimulation protocol in two outpatient units. (Vienna, Austria and Budapest, Hungary) Multiple regression (SAS; proc Logistic) and two separate analyses were performed on pregnancy rates using a harmonic sinoidal trend based on the synodic and anomalistic lunar cycles respectively.

RESULTS: The overall pregnancy rate was 30.9%. The amplitude of harmonic sinoidal, trend for the synodic lunar cycles was chi2 = 1.63,2d.f., p = 0.44 and chi2 = 6.27,2d.f., p = 0.044 for the anomalistic moon periods. For the anomalistic lunar months the amplitude of harmonic sinoidal trend was borderline in terms of higher pregnancy rates with the moon in Perigee.

CONCLUSION: The cause of seasonal changes in IVF-ET outcomes is probably very complex. Our results indicate that lunar influence may only be one of the contributing factors. Further studies are needed to clarify unexplained fluctuations of pregnancy outcomes.