Conceptually migration can affect fertility through adaptation, selection, disruption orrnsocialization. This effect can be expressed in children ever born, timing of birth, contraceptivernuse or conception. The study attempts to examine the impact of migration on fertility (childrenrnever born and timing of birth) with regard to adaptation and disruption hypothesis in AddisrnAbaba Ethiopia using data from the 2016 Ethiopian Demographic and Health Survey. To discernrnthe effect of migration on cumulative fertility and timing of birth Poisson regression and discreterntime event models were fitted. Poisson regression model is explored to study the impact ofrnmigration on mean CEB with respect to adaptation model while; discrete time event model isrnexplored to study the effect of migration on delaying timing of first and second birth in respect ofrndisruption model. Migrants were compared with non-migrants living in Addis Ababa. Inrnaddition, characteristics of migrants by duration at place of destination are also examined andrncompared with those non migrants. The study reveals non-significant relationship betweenrnmigration and lifetime fertility of women which is against to the concept of adaptationrnhypothesis. The results also indicate there is difference in hazard of first and second birthrnbetween migrants and non-migrants. However, this evidence strengthens migration effect inrndelaying timing of first and second birth for migrant which support disruption hypothesis. Thernstudy finds that migrant adaptation in fertility was not evident but gives speculative evidence forrnfertility disruption of migrants for first and second birth in the context of Addis Ababa. Futurernresearches further investigate determinants of migrant fertility in Addis Ababa and also examinernthe relationship with regard to other fertility differentials (selection and socialization).