This paper investigates four mathematical models of fertility. The aim of this paper is to examine the suitability of these models to Egypt's data to deduce the suitable mathematical model of fertility in Egypt. Models are tested, a) The Gompertz model, b) the Hadwiger model, c) the truncated Pearson type III curve (the incomplete gamma function), and d) the Pearsonian type I curve (the beta function). The data used to test the models are Egypt Demographic and Health Survey (EDHS), 1992, 1995, and 2000. The results indicate that the truncated Pearson type III curve is useful in describing fertility patterns in Egypt, but the other models are not useful in describing fertility patterns in Egypt.