There are differences in developed countries and developing countries. Developing countries are the lower class and middle class countries. These are the countries that have low income and are usually a poor country. The developed countries are the high income countries. There are a lot of factors to consider why these countries are the way they are. Fertility Transition is the decline of birthrates from high levels to low levels in a population. Fertility rate, poverty, pollution and education are just a few factors that affect the economy and the country.
Fertility often happens in poor countries. It falls back on the fact that people in poor countries are less educated people. It is like a cycle. If a country is already poor and struggling and families are growing there is no time or opportunity to catch up to become stable. Developed countries on the other hand are more stable and educated.
Therefore, families are smaller and fertility rates begin to lower.
Lower fertility rates are known as a fertility transition. In our book Environmental Science, by Richard T. Wright, states that Epidemiologic transition is a shift from high death rates to low death rates in a population as a result of modern medical and sanitary development. Which is in the developed of countries birthrates have declined from a high of 40 percent to 50 percent per thousand to 8 to 12, is causing a fertility transition. Just as crude birth rates dropped crude death rates have lowered as well causing an epidemiologic transition. By the middle of the 19th century, however, the epidemics and other social conditions responsible for high death rates began to recede, and death rates in Europe and North America declined. Primitive stability resulting from a high CBR being offset by an equally high CDR are...