The Effect of Smart-Phone Interventional Messages on Gestational Weight Gain

Methods: The study is a randomized controlled experimental study. Groups were determined by stratified randomization according to the BMI of the pregnant women. In the study, individual identification form, Healthy Living Behaviors in Pregnancy Scale (HLBPS), and maternal questionnaire were used. The initiative program was carried out via WhatsApp messages on a smartphone. Messages regarding routine prenatal care were sent to the intervention group three times a week, and to the control group once a month, about appropriate weight gain, nutrition, and physical activity via WhatsApp. Results: The mean gestational weight gain was 13.1±4.3 in the intervention group and 14.6±4.2 in the control group, and no significant difference was found between the groups. According to the IOM guideline, there was a significant difference between the groups in terms of appropriate GWG , while no significant difference was found between excessive GWG.HLBPS scale total score, nutrition and physical activity post-test mean scores increased significantly in the intervention group compared to the control group. In the intervention group, the group/time interaction in the scale total score, nutrition and physical activity scores of the pregnant women who gained appropriate weight according to the IOM guideline was significant, and the intervention was effective.Significant differences were found between the groups in the pretest-posttest score differences in the HLBPS total score, nutrition and physical activity sub-dimensions of the pregnant women. Conclusion: Healthy nutrition and physical activity short message intervention with a smart phone increased the appropriate gestational weight gain rates of pregnants in the intervention group according to the IOM guideline, and the intervention was effective. However, there was no difference between the groups in terms of excessive gestational weight gain. It is recommended to conduct studies with a high level of evidence, including internet