Y a-t-il une saison pour faire des enfants ?

Régnier‐Loilier, Arnaud; Rohrbasser, Jean-Marc

doi:10.3917/popsoc.474.0001

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…They have been extensively analyzed, the importance attributed to them ranging from high (Villerme, 1831) to as unimportant in e.g. some French population (Regnier-Loilier and Rohrbasser, 2011) or seen as acting jointly with economic development (Huber and Fieder, 2011;Seiver, 1985) due to the reasoning that poor populations are negatively affected by low temperatures during winter or, on the contrary, by hot summers without air conditioning. Other researchers (Macfarlane, 1974;Lam and Miron, 1994) stated that weather affects the seasonality of births as long as there are major temperature differences over the year.…”

Section: Introductionmentioning

confidence: 99%

Effect of religious rules on time of conception in Romania from 1905 to 2001

et al. 2015

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B.V.I., M.A. and G.R. have no competing interests to declare. There is no connection to the current paper, but C.H. declares that (i) he is currently conducting a research titled 'Chronic Diseases' Direct Costs within the Romanian Health System' funded by Local American Working Group; (ii) his wife is employed to a Romanian company (A&D Pharma) that does business in the pharmaceutical sector. This paper is a part of G.R. and M.A. scientific activities in COST Action TD1210. This work by C.H. was co-financed by the European Social Fund through project number POSDRU/1.5/S/59184.

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Section: Introductionmentioning

confidence: 99%

Effect of religious rules on time of conception in Romania from 1905 to 2001

et al. 2015

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“…This increase has been attributed to the holiday celebrations, which promoted greater conception through increased sexual activity among the public. [1][2][3][4] Although exceptions exist, the principle finding of this systematic review, of baby booms 9(±1) months after winning or hosting major sports tournaments, across different sports and continents, is consistent with the mechanism of celebratory sexual intercourse. 9 After a team wins, it has been hypothesized that a person's happiness coincides with a hormonal shift that elevates their desire for sexual activity.…”

Section: Comparison With Other Studiesmentioning

confidence: 51%

“…A rise in the number of births 9 months later has been linked, in some settings, to a variety of events, including carnivals, religious and secular holidays such as Christmas and New Year's Day (January 1). [1][2][3] This increase has been attributed to the holiday celebrations encouraging more conception, 9 months earlier, 4 through increased sexual activity among the populace.…”

Section: Introductionmentioning

confidence: 99%

Sporting tournaments and changed birth rates 9 months later: a systematic review

Masukume

Grech

Ryan

2022

Preprint

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Introduction Emerging evidence suggests that major sporting tournaments are associated with increased birth rates 9 months afterwards. This increase has been attributed to the celebratory atmosphere encouraging more conception through increased sexual activity among the populace. Methods Studies that examined the relationship between a major sporting tournament and altered birth metrics (number of births and/or birth sex ratio, defined as male divided by total live births) 9(±1) months later were sought out systematically through searches of PubMed and Scopus. Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines were followed in conducting this study. Results Six major sporting tournaments were linked to noticeably increased birth metrics 9(±1) months later. The Super Bowl (increased United States birth sex ratio in multiple years, however, from 2004 to 2013 there were no observable birth increases in winning counties and losing was not associated with a changed number of births), the 2009 UEFA Champions League (16% increase in Solson&eacutes and Bages births in Spain), the 2010 FIFA World Cup (increased birth sex ratio and over 1000 extra births in South Africa), the 2016 UEFA Euros (2% increase in Northern Ireland births) and the 2019 Rugby World Cup (increased birth sex ratio in some Japanese prefectures). Nine months after the most popular provincial la Liga soccer teams unexpectedly lost matches, there were 0.8% fewer births in those provinces from 2001 to 2015; the number of births were unaffected by unexpected wins. After the 1998 FIFA World Cup a changed sex ratio at birth was not witnessed 9 months on. Nine months following a performance improvement of one standard deviation by a European national soccer team at the FIFA World Cup or UEFA Euro Championships, from 1960 to 2016, there was a 0.3% decline in births 9 months on. Conclusions With a few exceptions, major American football, Association football (soccer) and Rugby apex tournaments in Africa, North America, Asia and Europe were associated with increases in the number of babies born and/or in the birth sex ratio 9(±1) months following notable team wins and/or hosting the tournament. Related to this, unexpected losses by teams from a premier soccer league were associated with a decline in births 9 months on. In conclusion, Nelson Mandela was correct when he averred, "Sport has the power to change the world. It has the power to inspire, it has the power to unite people in a way that little else does."

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“…It is known that religious rituals are quite tied to seasonal activities. Therefore, a weaker attachment to religious principles might modify the seasonality effect [37]. However, a Fourier transform of the examined data in the main text and an extraction of whatever cycles are not part of the present investigations, only concerned by whether the daily birth production is a coherent or not signal.…”

Section: Discussionmentioning

confidence: 90%

Hurst exponent of very long birth time series in XX century Romania. Social and religious aspects

Rotundo

Ausloos

Herţeliu

et al. 2015

Physica A: Statistical Mechanics and its Applications

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The Hurst exponent of very long birth time series in Romania has been extracted from official daily records, i.e. over 97 years between 1905 and 2001 included. The series result from distinguishing between families located in urban (U) or rural (R) areas, and belonging (Ox) or not (NOx) to the orthodox religion. Four time series combining both criteria, (U,R) and (Ox, NOx), are also examined.A statistical information is given on these sub-populations measuring their XX-th century state as a snapshot. However, the main goal is to investigate whether the "daily" production of babies is purely noisy or is fluctuating according to some non trivial fractional Brownian motion,in the four types of populations, characterized by either their habitat or their religious attitude, yet living within the same political regime. One of the goals was also to find whether combined criteria implied a different behavior. Moreover, we wish to observe whether some seasonal periodicity exists. *The detrended fluctuation analysis technique is used for finding the fractal correlation dimension of such (9) signals. It has been first necessary, due to two periodic tendencies, to define the range regime in which the Hurst exponent is meaningfully defined. It results that the birth of babies in all cases is a very strongly persistent signal. It is found that the signal fractal correlation dimension is weaker (i) for NOx than for Ox, and (ii) or U with respect to R. Moreover, it is observed that the combination of U or R with NOx or OX enhances the UNOx, UOx, and ROx fluctuations, but smoothens the RNOx signal, thereby suggesting a stronger conditioning on religiosity rituals or rules.

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Y a-t-il une saison pour faire des enfants ?

Cited by 10 publications

References 5 publications

Effect of religious rules on time of conception in Romania from 1905 to 2001

Effect of religious rules on time of conception in Romania from 1905 to 2001

Sporting tournaments and changed birth rates 9 months later: a systematic review

Hurst exponent of very long birth time series in XX century Romania. Social and religious aspects

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