Seasonality of birth in India

Bernard, Roger; Bhatt, Rohit; Potts, Daniel; Rao, Arathi

doi:10.1017/s0021932000011901

Cited by 12 publications

(4 citation statements)

References 25 publications

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“…Becker, Chowdhury & Leridon (1986) reported that the peak in stillbirths in Matlab, Bangladesh, was in the hot, wet months (May-August) while the peak in births was in the cooler months (October-December). Similar results have been reported in Sweden (Sandahl, 1974) and India (Bernard et al, 1978), with live births and stillbirths being negatively correlated. Among the Negev Bedouins, the peak in stillbirths corresponded to the lowest trough in live births (Fig.…”

Section: Discussionsupporting

confidence: 88%

Seasonality of births among Bedouin Arabs residing in the Negev Desert of Israel

et al. 1990

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From 1 January 1981 to 31 December 1982 information on all births to Bedouin Arab women residing in the Negev Desert of Israel showed a previously unreported seasonal pattern. The peak season, NovemberFebruary, coincided with the period of cool temperatures and the Bedouin Arab cultural seasons of winter and spring. This pattern is different from those of Jewish and Christian groups in the same region, a difference not attributable to religion alone. Sociodemographic factors associated with the peak season of birth include traditional occupations of fathers, multiparae 2+, and traditional place of residence. This pattern has persisted over the past 15 years although it is less apparent among the more recently sedentarized Bedouin Arabs.

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Section: Discussionsupporting

confidence: 88%

Seasonality of births among Bedouin Arabs residing in the Negev Desert of Israel

et al. 1990

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“…Since then many such studies have been carried out worldwide (Anand et al, 2000;Ayeni, 1986;Cowgill, 1965;Ferguson, 1987;Hajek et al, 1981;Levy, 1986;Matsuda and Kahyo, 1994;Mathers and Harris, 1983;Odegard, 1977;Ogum and Okorafor, 1979;Parker et al, 2000Rosenberg, 1966Roenneberg and Aschoff, 1990a, b;Shimura et al, 1981). Very few studies (Bernard et al, 1978;Boklage et al, 1992a;Erhardt et al, 1971;Macfarlane, 1974;Roenneberg and Aschoff, 1990a;Seiver, 1985) specifically investigated the seasonality of human conception.…”

Section: Introductionmentioning

confidence: 99%

Annual Pattern of Human Conception in the State of Texas

Chandwani

Cech

Smolensky

et al. 2004

Chronobiology International

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A total of 2,828,068 State of Texas singleton conceptions, estimated from the date of the first day of the last menstrual period, were assessed for annual periodicity by multiple-component (1-yr fundamental plus the 6- and 3-month harmonics) Cosinor analysis. An annual pattern (p < 0.001) of conception was detected with a December peak, end of July-beginning of August trough and modest amplitude (total peak-to-trough variation) equal to 13.3% of the yearly mean. Annual patterns (p < 0.005) of generally comparable peak and trough times were also documented for conceptions categorized by maternal marital status, age, ethnicity, years of education, birthplace, and county (Texas-Mexico border vs. non-border) of residence. The amplitude, a measure of the prominence of the annual pattern, varied by race (two-fold greater for non-Hispanic Blacks and Hispanics than non-Hispanic Whites), age (50-60% greater for the 19-year-old and younger group than the 20-29 and 30-44-year-old groups) and maternal education (two-fold greater for those with 0-8 than 13 or more years of schooling). Annual patterns (p < 0.001) in conceptions, generally with December peak and end of July-beginning of August trough, were also detected for neonatal variables categorized by birth weight, birth order, gestational age, and gender. The amplitude of the annual pattern in conceptions varied directly with gestational age and inversely with birth weight class.

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“…33,34 Many reasons are proposed or postulated. [35][36][37][38][39] Some believed this may be due to increased conception rate in summer. Possibly changes in hormone levels in both partners affect conception.…”

Section: Discussionmentioning

confidence: 99%

Influence of climate on semen quality: A retrospective study

Skandhan

Sundaram

et al. 2023

Urologia

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Introduction: World over studies are being done by different group of workers to understand the time of deliveries conducted. Surprisingly majority of deliveries were following a pattern, seasonally. Today in this busy world, couples choose comparatively a free time for delivery and preparation for conception is done accordingly. Apart from these, it is clearly shown majority of deliveries are conducted during a particular season. We hypothesised that the change in semen quality during different seasons is responsible for this phenomenon. Materials and methods: Present study conducted on semen quality included 12,408 semen samples collected from different laboratories of Bangalore city during 8 years (2000–2007) period of time and were analysed season wise. Results: Results showed sperm concentration was significantly lower in monsoon than in winter season. Humidity and pressure influenced sperm count. Forward moving sperms were influenced by temperature and pressure. Summary: The study concludes the change in birth rates seen during different season in a year is due to the quality of semen responsible for conception.

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Seasonality of birth in India

Cited by 12 publications

References 25 publications

Seasonality of births among Bedouin Arabs residing in the Negev Desert of Israel

Seasonality of births among Bedouin Arabs residing in the Negev Desert of Israel

Annual Pattern of Human Conception in the State of Texas

Influence of climate on semen quality: A retrospective study

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