A brief review of the technique of hysterosalpingography is provided. It remains an important diagnostic study in searching for causes of infertility. HSG is a safe, simple procedure that enables the lumina of the uterine cavity and fallopian tubes to be outlined. Fundamentals in techniques have been stressed so as to limit the errors of omission and commission. During the course of many years, I have been honored by my colleagues, who have requested me to review interesting HSGs. Thus, I have been able to accumulate a series of x-rays that I can share with the readers of Modern Trends. Although these photographs seemed unique, many of them probably have been seen by other investigators. They are presented because of their important diagnostic features.