Outcome measures
fatigue, pain, Pain, anxiety
The instruments used in this study included a research unit selection checklist, demographic-pregnancy form, and the short-form McGill Pain Questionnaire. Moreover, three information forms were also employed to gather data, one of which was related to the progress of labor and fetal and maternal status, the other one was related to the first and second stages of labor and infant status and the last one regarding women's satisfaction from their intervention. Also fatigue and hunger was measured through two separate visual analog scale for pain(100-mm line at the end of which means not having fatigue or hungry and 100 at the other end indicates the most severity of fatigue or hungry respectively). Spielberger state- trait anxiety inventory has been used as anxiety measurement as well. The validity of the questionnaires (demographic, progress of labor, fetal and maternal status, first and second stages of labor and satisfaction from intervention) was determined using content validity by the first researcher of paper. The application of the short-form McGill Pain Questionnaire, as a valid tool for pain measurement, has been approved in different countries. It has also been validated in Iran by using criterion validity with an obtained correlation of 0.854. The reliability of this instrument has been confirmed repeatedly in different studies performed in Iran and other countries [