The general goal of the study is determining the effect of Trans- theoretical model-based education on knowledge, attitude and decision making toward childbearing in reproductive age women who referring to community health centers in Amol city. The specific objectives of this plan are to determine and compare the attitudes, knowledge, decision-making balances, self-efficacy, and stages of behavior change towards childbearing in two groups, the test and control are before and after intervention. The type of this study was experimental, multi-stage sampling method and the selection of samples in each group was random and simple, and the number of samples was 76 in each group (152 in total) which are randomly selected from the two health centers of the urban community of Amol. Inclusion criteria are marriage; fertility; being healthy; aged 18 to 35, exclusion criteria are marital conflicts; Prohibition of childbearing. Training sessions are 5 one-hour sessions and various methods such as lecture with slideshow (with issues of importance and benefits of childbearing, healthy lifestyle before pregnancy, pre-conception counseling, etc.), video, question and answer, small group meetings. Primary outcomes are knowledge and attitude towards childbearing. Secondary outcomes are Structures such as stages of behavior change, self-efficacy and decision-making balance. Independent variable is Trans-theoretical model-based education. Dependent variables are attitude and knowledge about childbearing, self-efficacy, decision-making balance and the stages of behavior change.