In this study, block randomization method, which is one of the following limited randomization groups, is used. 4-block method is used to create a random allocation sequence in this study. Pregnant women will be selected according to the criteria of the researcher and are randomly assigned to the central Randomization method in two groups (intervention) and B (control).In order to perform this task, the sequencing website will be created by random blocks.In this study, by using the software, by the methodology consultant, the random allocation sequence is obtained., in this study, the random sequence of blocks will be provided to the specific of the research team, which is responsible for the random allocation.With the arrival of mothers to study and register them at any centre, at the same time, all persons and their conditions will be recorded in a central list, and they will receive a code in order to log in.Then it is responsible for the allocation of codes to receive and assign people to intervention and control groups.Mhaghqbrasas the entry of participants to study with the relevant center and questions about the random allocation of the participant to the study group.Communication methods include using your phone, message, fax, email, etc