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In many countries, rates of premature births have increased between the 1990s and 2010s. [2] Complications from preterm births resulted globally in 0.81 million deaths in 2015, down from 1.57 million in 1990. [7] [22] The chance of survival at 22 weeks is about 6%, while at 23 weeks it is 26%, 24 weeks 55% and 25 weeks about 72%. [23]
Between 2010 and 2014, babies in the United States had an approximately 70% survival rate when born under weight of 500 g (1.10lb), an increase from a 30.8% survival rate between 2006 and 2010. [15] A baby's chances for survival increases 3 to 4 percentage points per day between 23 and 24 weeks of gestation, and about 2 to 3 percentage points ...
The survival rate in these countries for infants born before 28 weeks of gestation is 10%, compared with a 90% survival rate in high-income countries. [28] In the United States, the period from 1980 to 2000 saw a decrease in the total number of infant mortality cases, despite a significant increase in premature births. [29]
According to data from 2003 to 2005, survival rates are 20–35% for babies born at 23 weeks of gestation (5 + 3 ⁄ 4 months); 50–70% at 24–25 weeks (6 – 6 + 1 ⁄ 4 months); and >90% at 26–27 weeks (6 + 1 ⁄ 2 – 6 + 3 ⁄ 4 months) and over. [22] It is rare for a baby weighing less than 500 g (1 lb 2 oz) to survive. [21]
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Premature births linked to air pollution cost the U.S. more than $4 billion in 2010, according to a new study.
Infant mortality rate: Number of child deaths within the first 12 months of life divided by total number of births. [9] Under 5 mortality rates: Number of child deaths within the 5th birthday divided by total number of births. [9] Child Mortality refers to the premature deaths of any child under the age of 5 years old.
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