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A Influência das Fases da Lua sobre os Partos em Vacas Leiteiras em França
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Abstract(s)
A Lua está no centro de muitas crenças populares. Diz-se, em particular, que o número de nascimentos
aumenta nos dias de Lua Cheia. É esse princípio que muitos criadores seguem para antecipar os
períodos de partos. No entanto, embora esse tema já tenha sido objeto de várias pesquisas na
medicina humana, ele foi menos estudado na criação de bovinos leiteiros. Este estudo retrospetivo foi
realizado com o objetivo de avaliar a influência dos ciclos lunares, revolução sinódica e periódica, sobre
a distribuição dos partos. Foram analisados os dados de 383 927 partos de raça Montbéliarde
ocorridos entre 3 de março de 2022 e 29 de janeiro de 2025 na região de Franche-Comté, França. A
análise estatística foi realizada utilizando o teste de ajustamento do χ!, complementado pela análise
de resíduos de Pearson e pela correção de Holm-Bonferroni. Foi observada uma influência significativa
do ciclo lunar na distribuição dos partos. No que diz respeito à revolução sinódica, os dias com aumento
no número de nascimentos situam-se entre os dias 0 e 2 do ciclo lunar. Entre as primíparas, também
foi observado um aumento no dia 23, e entre as multíparas, no dia 7. Embora nenhuma diferença
significativa tenha sido encontrada entre as fases crescente e minguante, a fase de Lua Nova registou
o maior número de nascimentos, enquanto a fase de Lua Cheia registou o menor número em todos os
grupos. Um aumento significativo no número de partos foi observado entre a Lua Nova e o Primeiro
Crescente, enquanto entre o Primeiro Crescente e o Primeiro Quarto foi registada uma queda. Quanto
à revolução periódica, foi a fase da Lua descendente que registou o maior número de nascimentos.
Esses resultados sugerem uma relação significativa entre certas fases do ciclo lunar e o número de
partos, especialmente em torno da Lua Nova. Esses dados podem ajudar a melhorar a gestão dos
períodos de parto.
The Moon is at the centre of many popular beliefs. It is often said that the number of births increases during Full Moon days. This principle is followed by many breeders to anticipate calving periods. However, although this topic has already been the subject of several studies in human medicine, it has been less explored in dairy cattle farming. This retrospective study was conducted to evaluate the influence of lunar cycles, synodic and periodic, on calving distribution. Data from 383,927 calvings of Montbeliarde breed that occurred between March 3, 2022, and January 29, 2025, in Franche-Comté, France were analysed. Statistical analysis was performed using the chi-square goodness-of-fit test, complemented by Pearson´s residual analysis and the Holm-Bonferroni correction. A significant influence of the lunar cycle on calving distribution was observed. Regarding the synodic cycle, days with an increased number of births were observed between days 0 and 2 of the lunar cycle. Among primiparous cows, an increase was also observed on day 23, and among multiparous cows on day 7. Although no significant difference was found between the waxing and waning phases, the New Moon phase recorded the highest number of births, while the Full Moon phase recorded the lowest number in all groups. A significant increase in calvings was observed between the New Moon and the Waxing Crescent, while a decrease was noted between the Waxing Crescent and the First Quarter. Concerning the periodic cycle, the phase of the Moon Descending recorded the highest number of births. These results suggest a significant relation between certain phases of the lunar cycle and the number of calvings, especially around the New Moon. These findings may help improve the management of calving periods.
The Moon is at the centre of many popular beliefs. It is often said that the number of births increases during Full Moon days. This principle is followed by many breeders to anticipate calving periods. However, although this topic has already been the subject of several studies in human medicine, it has been less explored in dairy cattle farming. This retrospective study was conducted to evaluate the influence of lunar cycles, synodic and periodic, on calving distribution. Data from 383,927 calvings of Montbeliarde breed that occurred between March 3, 2022, and January 29, 2025, in Franche-Comté, France were analysed. Statistical analysis was performed using the chi-square goodness-of-fit test, complemented by Pearson´s residual analysis and the Holm-Bonferroni correction. A significant influence of the lunar cycle on calving distribution was observed. Regarding the synodic cycle, days with an increased number of births were observed between days 0 and 2 of the lunar cycle. Among primiparous cows, an increase was also observed on day 23, and among multiparous cows on day 7. Although no significant difference was found between the waxing and waning phases, the New Moon phase recorded the highest number of births, while the Full Moon phase recorded the lowest number in all groups. A significant increase in calvings was observed between the New Moon and the Waxing Crescent, while a decrease was noted between the Waxing Crescent and the First Quarter. Concerning the periodic cycle, the phase of the Moon Descending recorded the highest number of births. These results suggest a significant relation between certain phases of the lunar cycle and the number of calvings, especially around the New Moon. These findings may help improve the management of calving periods.
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Keywords
Bovinos leiteiros Ciclo lunar Influência lunar Partos Calvings Dairy cattle Lunar cycle Lunar influence