Some pregnant women refer to ultrasound centers in appropriate time, without notifying their doctors, expecting desired results. Given the significant of the issue, the present study was conducted to investigate the attitude of pregnant women on the efficacy of ultrasound in diagnosing pregnancy based on level of education and number of pregnancies. The present study is a descriptive-analytical one conducted on pregnant women referring to Amir-al-Momenin Hospital of Zabol from 2015 to 2016. The questionnaires used in the present study were made by the Iranian gynecologists and radiologists; the questionnaire includes demographic features, the participant’s pregnancy history, and the number of ultrasound performed during the recent pregnancy. The data collected were analyzed with respect to frequency, percentage, mean, and standard deviation through using SPSS version 18.71 subjects (23.7%) were experiencing their first pregnancy, 67 subjects (22.3%) their second pregnancy, 96 subjects (32%) their third pregnancy, and 66 subjects (22%) were experiencing their fourth pregnancies . 112 subjects (37.3%) had no academic educational degree and 68 subjects (22.7%) had academic education. . in 77 cases (28.6%), ultrasound request was based on anomaly and 15 cases (5%) were based on pregnancy ultrasound and AFI analysis. The majority of poorly educated patients believe that ultrasound is harmful to their embryos and it manages to identify possible genetic and chromosomal disorders and physical complications of the embryo; they also seem to have insufficient information regarding gestational age and limitations, possibilities, and implications of routine pregnancy ultrasounds. Therefore, it is quite necessary to provide sufficient instruction for mothers regarding anomaly ultrasound