Methods	Non‐randomized Controlled Study in comprehensive health centers in Kermanshah, Iran
Participants	Inclusion criteria: individuals with a gestational age of 6–10 weeks (first gestational care (and overweight), body mass 25–9/29) were selected. Inclusion criteria for studying single pregnancy, having literacy, being able to read and write, being able to speak Persian, suffering from underlying diseases (such as diabetes, hypertension, thyroid, liver, and heart diseases), not being addicted, and being pregnant. Exclusion criteria: Not reported. Age [mean]—Intervention, Control 27.91, 27.53 Occupation [n (%)] Intervention, Control Housewife: 35 (77.8), 37 (82.2) Employed: 10 (22.2), 8 (17.8) Education [n(%)]—Intervention, Control Undergraduate: 13 (28.9), 11 (31.1) Diploma: 22 (18.9), 21 (46.7) University: 10 (22.2), 10 (22.2) Income [n (%)]—Intervention, Control Less than 2 million tomans: 8 (17.8), 9 (20.2) 2–3 mil: 27 (60), 21 (46.7) More than 3 million: 10 (22.2), 12 (26.7)
Interventions	Intervention—face‐to‐face training (n = 45) Description: Counseling sessions based on the health belief model, including four group counseling sessions, one session per week and each session for 45–60 min in groups (five to ten people) based on the pamphlet prepared according to the health belief model by lecture method, PowerPoint presentation, group discussion, Q&A, Giving pamphlets and explaining the food pyramid poster with the help of a nutrition consultant, the control group received day‐to‐day pregnancy care, and 1 month after the intervention, the two groups completed the questionnaires again. Nutrition counseling messaging: Basic introduction to the general principles of mothers’ familiarity with overweight and mother's familiarity with nutritional behavior Nutrition and the food pyramid of obesity and its healthy side effects. Explain the complications and problems of obesity in pregnancy to increase sensitivity and perceived severity, increase the perception of pregnant women in addition to the risk of obesity, provide statistics on the complications of obesity, summarize counseling sessions and plan the next session. Investigating the benefits and barriers to performing healthy eating behaviors to increase perceived benefits and reduce perceived barriers, identify barriers. Physical skills to improve the diet, answering potential questions of clients and their ambiguities and problems in the implementation of educational techniques and methods, summarizing the entire counseling process. Intervention adapted to local context: Not reported Women empowerment approach: Unclear empowerment approach Control (n = 45) Description: received day‐to‐day pregnancy care, and 1 month after the intervention
Outcomes	No outcomes of interest reported
Notes	Funding: Not reported