Ethical considerations
The ethics committee of Tehran University of Medical Sciences approved the research procedure (IR.TUMS.FNM.REC.1398.135). At the beginning of the study, the researchers provided the necessary explanations about the intervention and the study’s objectives to the participant. After receiving sufficient information from various aspects of the research, all participants provided a signed written informed consent, and they could leave at any stage of the research. Each woman was assigned a unique code to ensure the confidentiality of their medical information, which prevented the identification of the participants.