In an experimental research, 100 nulliparous pregnant women with the gestational age of 28-36 weeks who had referred to health care centers in Kermanshah (western Iran) were randomly selected and after taking Written Informed Consent letter, assigned into case and control groups. The inclusion criteria consisted of nulliparous pregnant women with the gestational age of 28-36 weeks, women under 35 years old, and no contraindications for normal childbirth. Exclusion criteria included the absence of women in continuous training sessions, premature delivery, and maternal unavailability during the completion of the questionnaires.