Back ground- Study findings on inter-pregnancy interval and birth outcome looks rncontradictory. Some report that it is a risk factor for adverse perinatal outcomes while others say rnit has no association. Still, there is no agreed time period (interval) recommended best for the rngood outcome of pregnancy. rnObjective - To assess birth to pregnancy interval and its effect on perinatal outcomes in Addis rnAbaba. rnMethods- Cross sectional study on a sample of 1339 mothers who deliver on health facilities in rnAddis Ababa is done. Mothers in each health facility are included in the study consecutively, rnuntil the required sample is achieved. Health facilities have been selected by simple random rnsampling after being stratified into three strata (Governmental hospital, governmental health rncenter and private clinic/hospital). Data was collected using questionnaire and doing rnmeasurements. Data was processed and analyzed using EPI Info and SPSS computer soft wares. rnUnivariate and bi variate analysis is employed. rnResult- the rate of preterm, LBW and still birth was 7.1%, 5.6% and 3.1% respectively. The rnmean birth to pregnancy interval was 45.9+rn 27.3 months (95% CI 44.4, 47.3) and birth to rnpregnancy interval has no effect to poor perinatal outcome. rnRecommendations- further study on the effects of birth to pregnancy interval to other perinatal rnoutcomes and maternal well being has to be conducted.