The data collection tool included two components: (1) demographic characteristics (maternal age, gestational age, number of pregnancies, sex of fetus, education level, husband's level of education, employment status, wealth index, history of abortion, unwanted pregnancy, and sleep quality); (2) PC questionnaire. In order to calculate the wealth index as a composite measure of a pregnant woman's cumulative standard of living, easy-to-collect data on asset ownership by pregnant women and an analysis of key components were used. The PC questionnaire consists of 20 questions about common problems, including painful breasts, frequent urination, fatigue, nausea, vomiting, increased salivation, increased genital secretions, stomach discomfort, pica, mood swings, drowsiness, body skin thickening, backache, flatulence, constipation, hemorrhoids, sleep disorders, edema of the lower limbs, varicose veins of the lower limbs and skin itching. The questionnaire was based on the four-point Likert scale ranging from not at all to severe, and between 1 and 4 was scored. The overall score on the questionnaire is between 20 and 80. The validity of the questionnaire in the study of Karimi et al. using content and formal validity and qualitative method by ten experts related to the research subject was reviewed. The reliability of the questionnaire was also confirmed by Cronbach's alpha method (α = 0.84) (
1).