en <span style=font-size:12pt><span new= roman= style=font-family: times=><strong><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4472c4>Aims:</span></span></span></strong><span style=font-size:10.0pt><span cambria= style=font-family:> <span cambria= style=font-family:>Gestational diabetes is a medical complication. This study was conducted to investigate the role of HAPA in predicting diabetes control behavior and eating style in diabetic pregnant mothers referred to the healthcare centers of Abadan University of Medical Sciences (South of Iran).</span></span></span></span></span><br> <span style=font-size:12pt><span new= roman= style=font-family: times=><strong><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4472c4>Instrument & Methods:</span></span></span></strong> <span style=font-size:10.0pt><span cambria= style=font-family:>This descriptive cross-sectional study was done on 82 subjects selected by simple random sampling<b> </b><span cambria= style=font-family:>in 2021</span>. Data were analyzed using SPSS 25 software.<span style=color:#4472c4></span></span></span></span></span><br> <span style=font-size:12pt><span new= roman= style=font-family: times=><strong><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4472c4>Findings:</span></span></span></strong><span style=font-size:10.0pt><span cambria= style=font-family:> We found that 41.5% of mothers were in the age group of 21-30 years. Also, 43.9% were at the middle economic level. Among demographic variables, income was the strongest predictor of nutritional behavior (p=0.01, r=19.9, and β=-0.299). None of the model constructs alone predicted nutritional behavior in pregnant women. The HAPA model was able to predict 21% of the variance of the nutritional behavior among the subjects (p<0.001, r=0.210, and β=0.458).</span></span></span></span><br> <span style=font-size:12pt><span new= roman= style=font-family: times=><strong><span style=font-size:10.0pt><span cambria= style=font-family:><span style=color:#4472c4>Conclusion:</span></span></span></strong> <span style=font-size:10.0pt><span cambria= style=font-family:>Behavioral intention and action planning are effective in educating pregnant women to prevent and control diabetes.<span style=color:#4472c4></span></span></span></span></span><br> Eating,Pregnancy,Diabetes, Gestational,Nutritional Status, 651 657 http://hehp.modares.ac.ir/browse.php?a_code=A-10-75292-2&slc_lang=en&sid=4 M. Changizi 1003194753284600311699 1003194753284600311699 Yes Department of Community Medicine, Faculty of Medicine, Abadan University of Medical Science, Abadan, Iran H. Mohamadian 1003194753284600311700 1003194753284600311700 No Department of Community Medicine, Faculty of Medicine, Abadan University of Medical Science, Abadan, Iran D. Shojaezadeh 1003194753284600311701 1003194753284600311701 No Department of Health Education & Promotion, Faculty of Health, Tehran University of Medical Science, Tehran, Iran