This paper contributes to the debate on the immigrant population’s reproductive behaviors using an unconventional survey not designed for demographic analysis. Applying the own-child method to young women whose children are unlikely to have left home, we are able to reconstruct the numbers and date of births of children to foreign  women aged 15-40 years old arrived in Italy after the age 15. We then analyze the main determinants of fertility choices of these women making use of a twofold approach, i.e. looking jointly to quantum and tempo of fertility realized after migration. Namely we studied timing to first birth and the children ever born, after migration to Italy has occurred, fitting  event-history analysis and Poisson models. We focused on the effects of home-country background and migratory pattern and found that characteristics of migration strategy (e.g. reason for migration, age at arrival and presence of children before migration) represent the most important determinants of migrants’ fertility at destination, both for the tempo and quantum dimensions.