ArticleAnimals : an open access journal from MDPI2026
The Association Between Lunar Phases and Calving Frequency in Montbéliarde Dairy Cows in the Franche-Comté Region, France.
Article in Animals : an open access journal from MDPI, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Moon is at the centre of many popular beliefs, including the notion that the number of parturitions increases during Full Moon days, a belief widely held among breeders to anticipate calving periods. However, this association has been rarely explored in dairy cattle farming. This retrospective study was conducted to evaluate the association between the lunar cycles and calving distribution, with particular focus on a potential increase during full-moon nights. Data from 383,926 calvings of Montbéliard breed, recorded between March 2022 and January 2025, mostly in Franche-Comté (98.2%), France, were analyzed using a Generalized Linear Model (GLM). Results revealed a significant association between the lunar cycle and calving distribution. Model-adjusted means were significantly higher than the overall mean during the New Moon and the Last Quarter phases (+2.6%,
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