This article provides an overview of the various types of ovarian hormonal stimulation available for fertility treatments in reproductive medicine. The article is divided into three parts: First, prognostic and predictive parameters for successful hormonal stimulation therapy are presented. These should make it possible to anticipate whether ovarian response towards hormonal treatment will be too low (so-called low response) or too high (so-called high response). Subsequently, several forms of ovarian stimulation with the available stimulation drugs and protocols are described. The paper concludes with a brief summary for practical reproductive medicine. This work intends to summarize the topic and provide a quick orientation for reproductive medicine practitioners in daily clinical practice.