Birth defects due to season of birth

Birth defects due to season of birth





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Birth defects due to season of birth
Posted in 2013
The season in which a baby is born apparently influences the risk of developing mental disorders later in life, suggests a large new study.
The season of birth may affect everything from eyesight and eating habits to birth defects and personality later in life. Past research has also hinted the season one is born in might affect mental health, with scientists suggesting a number of reasons for this apparent effect.
"For example, maternal infections — a mother may be more likely to have the flu over the winter. Does this increase risk?" said researcher Sreeram Ramagopalan, an epidemiologist at Queen Mary University of London. "Or diet. Depending on the season, certain foods — fruits, vegetables — are more or less available, and this may impact on the developing baby."
"Or another key candidate is vitamin D, which is related to sunshine exposure," Ramagopalan added. "During the winter, with a lack of sunshine, mums tend to be very deficient in vitamin D."
However, this effect appears very small, and since past studies only looked at several thousand people at a time, there was a chance the link between birth month and later mental health might only be a statistical illusion. Also, prior research often pooled data from different nations, complicating analysis, since population trends can vary substantially between countries.
To pin down whether or not there was a link between seasons and the mind, Ramagopalan and his colleagues analyzed a very large number of births, all from the same country.
The scientists investigated whether the risk of schizophrenia, bipolar disorder and recurrent depression was influenced by month of birth in England. This included nearly 58,000 patients with the disorders and more than 29 million people from the country's general population.
My advise
1... Examining seasonal patterns of birth defects may help to identify environmental risk factors. Because the teratogenic window for most birth defects is during gestational weeks 3 to 8, investigating exposures closer to the timing of conception is important. However, studies are usually based on month of birth, which is not the biologically relevant exposure period and does not account for differences in gestational length. We aimed to determine whether the occurrence of birth defects varied by month of conception using the population-based New York State Congenital Malformations Registry (CMR).
2...     We merged live birth certificates (n = 2,044,091) with CMR records for mothers residing in New York State, excluding New York City, for the years 1992 through 2006. We categorized birth defects according to the National Birth Defects Prevention Network guidelines and performed Cochran-Armitage trend, Hewitt-Rogerson, and Walter-Elwood tests on month of conception and chi-square tests on season of conception. We graphed seasonal distributions and seasonality test results. We performed stratified analyses by maternal and infant characteristics.
3...     Results: Of 42 groups examined in the 15-year period, 24 (57%) had at least one statistically significant test result, suggesting a trend or seasonal variation: Cochran-Armitage (18), Hewitt-Rogerson (17), Walter-Elwood (4), and chi-square (5). Ventricular septal defect showed the most consistent results: Cochran-Armitage (p = 0.0006), Hewitt-Rogerson (December to May; p = 0.0130), Walter-Elwood (March 14; p = 0.0027), and chi-square (winter; p = 0.0046). Congenital cataract, pulmonary valve atresia/stenosis, coarctation of aorta, biliary atresia, and renal agenesis or hypoplasia had at least three significant tests.
4...     My research.. In India I found Asthma is the seasonal health problem and I researched on many families suffering from Asthma.   I found they were not used Vitamin C during their pregnancy in Winter season.
5...     When you are suffering from Asthma you should be careful of your food habits so that the child may not suffer from Asthma. When couple are suffering allergic should take Vitamin C, when couple are suffering from bone problem or digestion problem should eat healthy food to get Vitamin D during winter & rainy seasons. Because you will not get Sunlight to get Vitamin D. It helps to avoid birth defects of your child.
6.. ... During summer eat fruits which contain water to keep your body cool and helps to maintain body minerals.
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