Fertility transitions, ie. the childbearing and fecundity among populations has been seen to follow highly unpredictable statistics. Countries with developed economies in the past years has seen a transition to such levels below replacement level of one. A few Asian countries have also seen similar results, with levels of two. Many developing countries have seen sudden decline in fertility rates. This was debated and discussed by Malthus in “Essay on the Principle of Population”, (Malthus,1798)
Cleland & Wilson, 1987, in their article has said that there are many theories which try to explain why some countries have undergone significant fertility transitions. But there has been no single comprehensive theoretical framework which explains this. In this context, Mason 1997, developed her own theoretical framework which conveys ideas and is also interactional with the public using it. Ideational so that people are able to recognize changing perceptions towards induced fertility reductions and interactive, so that existant conditions and co-existant changes are also considered.