Tehran University of Medical Sciences Journal of Family and Reproductive Health 1735-8949 7 2 2013 06 15 57 61 Zhila Amirkhani Islamic Azad University Research Center, Tehran Medical Branch, Tehran, Iran. Meisam Akhlaghdoust Young Researchers' Club, Islamic Azad University, Tehran Medical Branch, Tehran, Iran AND tudents' Research Committee, Islamic Azad University, Tehran Medical Branch, Tehran, Iran. Media Abedian Students' Research Committee, Islamic Azad University, Tehran Medical Branch, Tehran, Iran. Gelareh Rabie Salehi Young Researchers' Club, Islamic Azad University, Tehran Medical Branch, Tehran, Iran AND Students' Research Committee, Islamic Azad University, Tehran Medical Branch, Tehran, Iran. Nesa Zarbati Sarem Cell Research Center- SCRC, Sarem Women's Hospital, Tehran, Iran. Maryam Mogharehabed Students' Research Committee, Islamic Azad University, Tehran Medical Branch, Tehran, Iran. Sahba Arefian Students' Research Committee, Islamic Azad University, Tehran Medical Branch, Tehran, Iran. Mina Jafarabadi Reproductive Health Research Center, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 16 Objective: To study the pregnancy outcomes in first trimester vaginal bleeding. Materials and methods: This cross sectional study was done on 60 pregnant women with first trimester vaginal bleeding referring to university hospitals affiliated to Islamic Azad University, Tehran, Iran. All women were evaluated for the outcomes including abortion, preterm rapture of membranes, preterm labor, second and third trimester vaginal bleeding, low birth weight and intra uterine growth retardation and the mode of delivery. Data were analyzed using SPSS- 11. Results: Placenta accreta, second trimester bleeding and preterm labor were significantly more prevalent in pregnant women with first trimester bleeding (P ≤ 0.05). Conclusion: According to results of present study vaginal bleeding in first trimester of pregnancy may predict further maternal and fetal complications. We recommend training pregnant women regarding those complications and their prevention. https://jfrh.tums.ac.ir/index.php/jfrh/article/view/290 https://jfrh.tums.ac.ir/index.php/jfrh/article/download/290/285