Differences in average family size have a large impact within a few generations. For example, consider the impact over four generations if each woman had only two children compared with three or with five. If each woman had two children, as in many developed countries today, and each of her children had two children each, and so did their children, the woman would have only eight great-grandchildren. As such numbers indicate, helping couples now to avoid unintended births can make a huge difference in future population size. Family planning is a choice that everyone should have.
Family planning helps millions of people today and also helps to assure a better future.
In countries where few couples use contraception, fertility is high. Where many use contraception, fertility is low.