Season and outdoor ambient temperature: effects on birth weight1

Murray, Liam; O’Reilly, Dermot; Betts, Nicholas; Patterson, Christopher; Smith, George Davey; Ae, Evans

doi:10.1016/s0029-7844(00)01022-x

Cited by 100 publications

(127 citation statements)

References 14 publications

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“…Murray and colleagues have argued that exposure to cold temperatures during mid-gestation can reduce placental blood flow, and thus lead to lower birth weights associated with late spring and in summer (Murray et al, 2000). Prenatal infection also warrants further research, in particular viruses that fluctuation with seasons (e.g.…”

Section: Interpretation Of Findingsmentioning

confidence: 99%

“…Compared to summer and autumn babies, those born in winter and spring tend to be heavier (Selvin and Janerich, 1971;Roberts, 1975;Matsuda et al, 1993;Murray et al, 2000;Waldie et al, 2000;Tustin et al, 2004;McGrath et al, 2005, in press) and longer (Wohlfahrt et al, 1998;Waldie et al, 2000;McGrath et al, 2005). These small anthropometric differences persist into adulthood: at age 18 winter/spring born individuals are taller compared to summer/autumn born individuals (Weber et al, 1998;Waldie et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

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Season of birth is associated with anthropometric and neurocognitive outcomes during infancy and childhood in a general population birth cohort

McGrath

Saha

Lieberman

et al. 2006

Schizophrenia Research

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The dseason of birthT effect is one of the most consistently replicated associations in schizophrenia epidemiology. In contrast, the association between season of birth and development in the general population is relatively poorly understood. The aim of this study was to explore the impact of season of birth on various anthropometric and neurocognitive variables from birth to age seven in a large, community-based birth cohort. A sample of white singleton infants born after 37 weeks gestation (n = 22,123) was drawn from the US Collaborative Perinatal Project. Anthropometric variables (weight, head circumference, length/height) and various measures of neurocognitive development, were assessed at birth, 8 months, 4 and 7 years of age. Compared to summer/autumn born infants, winter/spring born infants were significantly longer at birth, and at age seven were significantly heavier, taller and had larger head circumference. Winter/spring born infants were achieving significantly higher scores on the Bayley Motor Score at 8 months, the Graham-Ernhart Block Test at age 4, the Wechsler Intelligence Performance and Full Scale scores at age 7, but had significantly lower scores on the Bender-Gestalt Test at age 7 years. Winter/spring birth, while associated with an increased risk of schizophrenia, is generally associated with superior outcomes with respect to physical and cognitive development. D

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Section: Interpretation Of Findingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Season of birth is associated with anthropometric and neurocognitive outcomes during infancy and childhood in a general population birth cohort

McGrath

Saha

Lieberman

et al. 2006

Schizophrenia Research

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“…Factors exhibiting seasonal variation include, but are not limited to, exposure to sunlight, food availability and eating habits, and outdoor physical activity [4][5][6][7][8]. Only a few studies conducted in white populations living in relatively high-latitude regions have examined the association between the season or month of birth and type 2 diabetes in adulthood, with mixed results [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Season of birth and the risk of type 2 diabetes in adulthood: a prospective cohort study of 0.5 million Chinese adults

Guo

et al. 2017

Diabetologia

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Aims/hypothesis Season of birth as a surrogate for potential environmental exposure during fetal development and early postnatal life has shown an inconsistent association with adult type 2 diabetes in white populations living in high-latitude regions. The present study aimed to examine the association between birth seasonality and risk of adult type 2 diabetes in Chinese individuals living across wide regions of low latitude and lower to middle latitude. Methods Participants from the China Kadoorie Biobank were enrolled during 2004-2008 and followed up until 31 December 2013. After excluding participants with cancer, heart disease, stroke and diabetes at baseline, the present study included 189,153 men and 272,058 women aged 30-79 years. We used multivariable Cox proportional hazards model to estimate the HR and 95% CI. Results During a median follow-up of 7.2 years (3.3 million person-years), we documented 8784 incident cases of type 2 diabetes. In the whole cohort, compared with summer-born participants, the adjusted HRs (95% CIs) were 1.09 (1.02, 1.16), 1.08 (1.02, 1.15) and 1.09 (1.02, 1.15) for those who were born in Spring, Autumn and Winter, respectively. The association was consistent in both men and women and across subgroups defined by residence and lifestyle factors later in life.

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“…Murray and colleagues have argued that exposure to cold temperatures during mid-gestation reduce placental blood flow, and thus results in the lower birth weights associated with late spring and in summer [20]. One might predict that small within-year fluctuations in maternal diet or energy expenditure could result in alterations in birth weight, but it is less clear how this might explain the change in limb length.…”

Section: Does Prenatal Vitamin D Alter Fetal Development?mentioning

confidence: 99%

“…In a sample from Northern Ireland [20], significant seasonal fluctuations in birth weight were found in singletons born after at least 36 weeks of gestation (n =418,817). The lowest birth weights were found in July (summer) and highest in February (winter).…”

Section: Introductionmentioning

confidence: 99%

Seasonal fluctuations in birth weight and neonatal limb length; does prenatal vitamin D influence neonatal size and shape?

McGrath

Keeping²,

Saha

et al. 2005

Early Human Development

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Season and outdoor ambient temperature: effects on birth weight1

Abstract: Infants born during late spring and summer are lighter than those born in winter, which might be the result of exposure to low winter temperatures during midgestation. Pregnant women should keep themselves warm during midpregnancy.

Cited by 100 publications

References 14 publications

Season of birth is associated with anthropometric and neurocognitive outcomes during infancy and childhood in a general population birth cohort

Season of birth is associated with anthropometric and neurocognitive outcomes during infancy and childhood in a general population birth cohort

Season of birth and the risk of type 2 diabetes in adulthood: a prospective cohort study of 0.5 million Chinese adults

Seasonal fluctuations in birth weight and neonatal limb length; does prenatal vitamin D influence neonatal size and shape?

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