Demography is the study of human population. The study of demography can be traced back to the 17th century when an Englishman named Graunt began to keep mortality records. Since that time, the field of demography has expanded to include the study of just about everything having to do with population.
Fertility has to do with reproduction and everything that influences it.
Some common concerns for those who study fertility are the number of births in a given geographical location, the number of children a woman desires, and birth control. Those who focus on mortality may study the causes of death, in addition to its rates. Migration is the movement of people, which can be difficult to define. How far does a person have to move to be a migrant. Click on the icon to browse through some of my favorite population related web sites.