This part of ISO 7206 specifies test methods and the fatigue performance for the endurance properties, under specified laboratory conditions, of neck region of stemmed femoral components of total hip joint prostheses and stemmed femoral components used alone in partial hip joint replacement. This part of ISO 7206 does not cover the investigation of the performance of the head or the neck-head junction. It is applicable to modular and non-modular designs made of metallic or non-metallic materials. It also specifies the test conditions so that the important parameters that affect the hip femoral components are taken into account and describes how the specimen is set up for testing.