Described herein are various principles related to collecting and charting fertility data for a female (e.g., female humans). A dedicated device may be used to collect fertility data regarding the female. The device may include a thermometer for collecting a body temperature of the female as well as an interface for collecting data regarding a consistency and/or amount of a cervical fluid of the female. Once collected by the dedicated device, the fertility data may be transmitted wirelessly from the dedicated device via a wireless network (e.g., a wireless local area network) to a server that collects fertility data. The fertility data may then be displayed in a graph that enables a user to make determinations about a fertility cycle of the female, including determinations about times of high fertility. For example, from viewing the relationship between two lines included in the graph, the user may make determinations regarding fertility.