Everyone knows that normal durationpregnancy in women is 40 weeks or 9 months. Despite the fact that the birth of a child does not always occur on the expected day, in medical practice it is customary to consider a child full-term if he was born in a period of 38 to 42 weeks. The duration of pregnancy is often affected by the woman’s age, the general condition of the body and the lifestyle of the expectant mother, but now scientists have new data that indicate that thermal exposure also increases the risk of premature birth. According to already available statistics, from 1969 to 1988 in countries with a warm climate, there was a sharp increase in receipts to medical facilities for childbirth on the hottest summer days.
Why does heat provoke premature birth?
Marked increase in the number of births in particularHot days indicate that extreme exposure to ambient temperature provokes preterm delivery. According to an article published by Nature.com, an average of 25,000 babies a year are born prematurely as a result of exposure to heat. Scientists note that due to climate change and rising temperatures, in the future pregnant women will have a greater risk of premature birth than before. Due to the fact that, as a result of premature birth, the baby is not yet fully formed, the newborn may die as a result of cardiopulmonary failure or cerebral hemorrhage. But, fortunately, modern medicine already makes it possible to save a premature baby, even if he is born on a 26-week term.
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Using climate model data at the endThis century, scientists thought that pregnant women in the future will be prone to premature birth 2 times more. Thus, already at the end of the 21st century, the number of premature births in the United States will be 42,000 per year. To identify the exact cause of such an extreme impact of climate change on a pregnant woman, scientists have yet to figure out the processes that occur in the human body in response to rising temperatures. At this stage, scientists suggest that sudden changes in ambient temperature negatively affect the cardiovascular system, causing disruptions in its work and provoking premature birth. It is assumed that high temperature can increase the level of oxytocin, a hormone that is actively involved in pregnancy and feeding the baby.