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(Ivanhoe Newswire) -- Premature births in Scotland are nearly 10 times more common than they were 25 years ago, but survival rates of babies born early have improved dramatically, a study shows
The risk of neonatal death from premature birth more than halved during a 25-year period, and there has been an associated 10 per cent reduction in stillbirth associated with pre-term births. Researchers at the University of Edinburgh analyzed data relating to nearly 90,000 births in Scotland between 1980 and 2005. Researchers hope that better understanding of the trends and causes behind premature births will help to develop better treatments for expectant mothers.
The number of babies born prematurely increased from 54 per 1,000 births between 1980 and 1985 to 63 per 1,000 births between 2000 and 2005. Improvements in the survival rates of premature babies were greater when births were medically induced or babies were born by pre-planned Caesarean section, compared with pre-term births in which labor occurred naturally.
The findings support the shift towards more medically induced early births, with these preterm deliveries up more than 40 per cent compared with a 10 percent increase in early births from natural onset of labor.
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The research also found the growing number of expectant mothers with diabetes had resulted in an increase in the numbers of babies born prematurely. Researchers found a seven-fold increase in premature births where the mothers were diabetic before becoming pregnant. Premature births linked to gestational diabetes, where expectant mothers develop diabetes during pregnancy, also increased four-fold over the study period.
High blood pressure in expectant mothers, however, remained the major factor linked to pre-term births although the proportion of babies born prematurely as a result of this condition decreased over the 25-year study period.
A rise in the average age of women becoming pregnant was not found to have affected the incidence of premature births.
Professor Jane Norman, Director of the Tommys Centre for Maternal and Fetal Health Research at the University of Edinburgh, was quoted as saying, The increase in survival rates for babies born prematurely backs up decisions by doctors to medically induce births to prevent potential complications. The increase in diabetes as a factor in premature births is also interesting and may be because there are more women with pre-existing diabetes which is linked to obesity as well as better diagnosis of expectant mothers with gestational diabetes.
SOURCE: PLoS Medicine, September 21, 2009
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