Tehran University of Medical Sciences Journal of Family and Reproductive Health 1735-8949 13 3 2019 12 01 167 172 Farnaz Sahhaf Women’s Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran Somaiyeh Saiyar-Sarai Women’s Reproductive Health Research Center, Tabriz University of Medical Sciences, Tabriz, Iran Reza Piri Liver and Gastrointestinal Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran AND Department of Nuclear Medicine, Odense University Hospital (OUH), Odense, Denmark Sahar Mohammadi Medical Philosophy and History Research Center, Tabriz University of Medical Sciences, Tabriz, Iran AND Department of Emergency Medicine, Zanjan University of Medical Sciences, Zanjan, Iran Mohammad Naghavi-Behzad Students Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran AND Department of Clinical Research, University of Southern Denmark, Odense, Denmark 2019 04 12 2019 10 08 Objective: To compare the difference in Vitamin D level between women with ectopic pregnancy and control group. Materials and methods: In the present case-control study, 150 patients with ectopic pregnancy were included as case group and 150 women with normal pregnancy as a control group. Then, serum vitamin D levels were measured in both groups and they were then compared with each other. P less than 0.05 was considered statistically significant. Results: The mean age in ectopic pregnancy group was 28.12 ± 5.91 and 27.35 ± 6.21 years old in control group; the difference between two groups was not statistically significant (p = 0.43). The vitamin D level in control group was higher than that of ectopic pregnancy group (p = 0.002). Of all patients, 182 patients (60.66%) had vitamin D deficiency and 64 patients (21.33%) had vitamin D insufficiency. Conclusion: Serum vitamin D level among patients with ectopic pregnancy was statistically lower than women with normal pregnancy. https://jfrh.tums.ac.ir/index.php/jfrh/article/view/1112 https://jfrh.tums.ac.ir/index.php/jfrh/article/download/1112/495