Sampling
SIB
Following ethics committee approval and registration of the study in the Iranian Registry of Clinical Trials under the code IRCT20110524006582N33 in 2020/08/19, the sampling permission was obtained from the research deputy of the nursing-midwifery school and the deputy of the health department of East Azerbaijan province in Iran. The researcher went to Tabriz’s health centers in populous and socio-culturally diverse districts and extracted a list of pregnant women through the integrated health system (SIB system) in health centers; the women were then contacted via the phone number, and the research goals and methods were briefly explained to them over the phone. Moreover, they were analyzed based on inclusion and exclusion criteria, and if they were eligible and willing to participate in the study, they were invited to attend relevant centers at specific times. The goals and methods of the research were thoroughly explained during this face-to-face meeting, and if the pregnant mother was willing to participate in the study, written informed consent was obtained from her, and participants completed the Rosenberg self-esteem scale and the Multidimensional Body–Self Relations Questionnaire (MBSRQ) [