We all know that the normal duration of pregnancy in women is 40 weeks or 9 months. Despite the fact that the birth of a child is not always in the expected day of, in the medical practice to consider the baby full-termif he was born within 38 to 42 weeks. For the duration of pregnancy often influence a woman’s age, overall health and lifestyle of the expectant mother, but now scientists have new data that suggests that the thermal effect also increases the risk of premature birth. On existing statistical data, from 1969 to 1988 in countries with a warm climate, there was a sharp increase in revenues to medical facilities for childbirth in the most hot summer days.
Why the heat provokes premature birth?
The marked increase in the number of births in particularly hot days, indicates that the extreme impact of ambient temperature provokes premature births. According to an article published by the portal Nature.comin an average 25,000 children per year are born earlier than expected as a result of exposure to heat. Scientists say that climate change and rise in temperature in the future pregnant women will have greater risk of preterm birth than before. Due to the fact that as a result of premature birth the child is born not yet fully developed, the newborn may die as a result of cardiopulmonary insufficiency or cerebral hemorrhage. But, fortunately, modern medicine allows us to save a premature baby, even if he is born on the 26-week period.
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Using data from climate models for the end of this century, researchers considered that pregnant women in the future will be prone to premature childbirth 2 times more. Thus, at the end of XXI century the number of premature births in the US is 42 000 per year. To identify the exact reasons for such extreme impacts of climate change on the pregnant woman, scientists have yet to figure out the processes that occur in the human body in response to increasing temperatures. At this stage, scientists suggest that sudden changes in ambient temperature adversely affect the cardiovascular system, causing a disruption in its work and provoking premature birth. It is assumed that the high temperature is able to increase the level of oxytocin the hormone that actively participates in the processes of pregnancy and nursing.