Background: First trimester vaginal bleeding (FTVB) plays a role in occurrence of late pregnancy complications in both mother and infant. Late pregnancy outcomes in mothers and infants are the main concerns for the obstetricians. The purpose of this study was to assess the perinatal outcome of pregnancies complicated by first trimester vaginal bleeding.Methods: The present study included total 100 singleton pregnant women with history of FTVB whose pregnancy was confirmed chemically. Patients were closely observed and follow up done 2 weekly upto 36 weeks and weekly after that. Late pregnancy outcomes such as gestational hypertension, pre eclampsia, placental abruption, preterm delivery and pre mature rupture of membranes in the mothers and low birth weight, intrauterine growth ristriction, apgar score after 1 and 5 minutes, and NICU admission in new born were calculated.Results: Incidence of PROM, gestational hypertension and placental abruption is more in women with FTVB. However there infant had higher rate of IUGR and LBW. Apgar score after 1 and 5 minutes were less than 5 and admission to NICU too.Conclusions: FTVB is an important factor to predict both the maternal and fetal outcomes in late pregnancy. It is therefore important to evaluate and consider these pregnancies as high risk group and provide careful antenatal care.