The term "fertility curve" refers to a graphical representation of the fertility rates of a population over time. This concept can be expressed using a variety of different terms, including "population growth curve," "population expansion graph," and "demographic transition chart." Other potential synonyms might include "birth rate trend analysis," "reproductive cycle assessment," or simply "population dynamics visualization." Ultimately, the most appropriate term will depend on context and the specific needs of the user. Regardless of the wording used, however, these types of charts can be invaluable tools for understanding and planning for population growth and demographic shifts.