The study of the Institute of Health Measurement and Evaluation (IHME) was published at the University of Washington, Seattle, in The Lancet magazine and compares public health in the world between 1950 and 2017.
In almost half of the world's countries, mainly in Europe and North and South America, many children are not born to maintain their population size. At the same time, birth continues to increase in Africa and Asia, with a common woman in Niger who has born seven children during his lifetime.
Education is the main factor
Ali Mokdad, a teacher in IHME, says that education is the most important factor for population growth.
If a woman is training herself, she spent more years in school, pressing her pregnancy and, therefore, will have fewer children, he said.
According to IHME, Cyprus is the least fertile country in the world – a woman in Cyprus gives birth to a child in her life. On the other hand, women in Mali, Chad and Afghanistan have an average of more than six children.
According to Mokdad, although the population of developing countries continues to increase, their economies generally increase, which usually have an impact on birth over a period of time.
The countries are expected to be economically improved and fertility is more likely to decrease and decrease.
More service life
We also live longer than ever before. The expected global life expectancy for men has increased to 71 years from 48 in 1950. Women are now expected to live to 76 compared to 53 in 1950.
Heart disease is now the most common cause of death globally, stating IHME. Up to 1990 there were neonatal problems, followed by lung diseases and diarrhea.
You see fewer deaths from infectious diseases as countries get more richer disabilities, but also because people are living longer, says Ali Mokdad.
He noted that, although deaths from infectious diseases such as malaria and tuberculosis have dropped significantly since 1990, new unavoidable diseases have occurred.
There are some behaviors that lead to more cases of cardiovascular disease and cancer. One is one obesity – it's increasing every year and our behavior contributes to it, he says.