BackgroundPregnant women experience several changes in their appearance, body shape and body image. In some studies, there has been a relationship between these changes and the type of delivery. This study aimed to investigate the relationship of the prenatal body image and genital image with the mode of delivery preferred by pregnant women in Gorgan in 2020.MethodsIn this cross-sectional study, 334 pregnant women were selected by stratified sampling. The Prenatal Body Image Questionnaire (PBIQ), Female Genital Self-Image Scale (FGSIS), pregnant women’s preferences for mode of delivery questionnaire (PPMDQ) and DASS-21 were completed on line. The data was analyzed using Spearman test and linear regression.ResultsThe average score of PBIQ, FGSIS, and PPMDQ was 68.24 (standard deviation = 17.71), 19.25 (standard deviation = 3.3), and 63.12 (standard deviation = 3.3) respectively. Vaginal delivery as a preferred mode of delivery was inversely correlated with dissatisfaction with body image (r=-0.32, P < 0.001), and directly correlated with satisfaction with the genital image (r = 0.19, P < 0.001). There was a significant inverse correlation between prenatal body image dissatisfaction and genital image satisfaction (r=-0.32, P < 0.001). While FGSIS score could not predict PPMDQ, PBIQ score could.ConclusionsSatisfaction with the prenatal body image or genital image is associated with the choice of vaginal delivery. These results can be the basis for prenatal care and childbirth counselling.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12884-023-05589-3.