Masoumeh Mosayebi-Molasaraie - MSc Student of Epidemiology, Department of Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
Shamim Pilehvari - Associate Professor, Endometrium and Endometriosis Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
Amin Doosti-Irani - Assistant Professor, Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
Zahra Cheraghi - Assistant Professor, Modeling of Noncommunicable Diseases Research Center, Hamadan University of Medical Sciences, Hamadan, Iran

Background & aim: Despite the concerns about using cell phones and internet on women's reproductive health, few studies have considered this issue, with most focusing on animal models. The present study was conducted to examine the effect of using cell phones and internet on miscarriage.Methods: In this case-control study, a sample of ۲۱۱ cases and ۳۹۴ controls were selected through stratified random sampling from women referred to urban health centers in Zanjan in ۲۰۱۹. Data on telephone and internet use was collected using a self-administered questionnaire, while health records were collected using a checklist. Women with miscarriage history were chosen randomly as the case and women with a successful pregnancy history as the control.Results:   Considering the average internet use per hour, and with the effect of other variables remaining constant, the odds of miscarriage increased, and this association was borderline significant (OR=۱.۰۷, ۹۵% CI: ۰.۹۹, ۱.۱۵, P=۰.۰۵۰). Meanwhile, for every hour of cell phone conversations during pregnancy, although the odds of miscarriage increased, but this association was not statistically significant (OR=۱.۱۲, ۹۵% CI: ۰.۸۶, ۱.۴۵, P=۰.۳۸۰). Similarly, turning off cell phones at night decreased the odds of miscarriage, but this association was also not statistically significant (OR=۰.۹۷, ۹۵% CI: ۰.۵۸, ۱.۶۱, P=۰.۳۸۰).Conclusion: Although the effect of internet use on miscarriage was small and had borderline statistical significance, it appears reasonable to take preventive measures to reduce exposure to low-frequency electromagnetic waves by pregnant women.

Cell phone, internet, Miscarriage, Case-Control Study