Prediction and detection of the fertile phase of the menstrual cycle: an overview.

Distinct means have been developed to answer an increasing demand and need for methods that can accurately predict and detect the fertile phase of the menstrual cycle and fit various indications and changing situations of women's reproductive life. Methods based on the detection of direct fertility markers, such as hormonal tests and ultrasound, are more objective and accurate than traditional markers based on indirect markers, but cost and dependence on supplies limit their application. Nevertheless, these methods could be used during a few cycles either as support in the teaching phase or in difficult cases and for specific indications. Likewise, some new devices designed to facilitate recording and calculation of fertility signals could be combined with clinical methods to improve prediction and detection of the fertile phase. Besides the search for new fertility markers and the development of new methods, the possibility of combining already existing methods would certainly improve use-effectiveness and acceptance.