Background: The international literature highlights the strong impact of the high risk of childbearing shortly after migration on period fertility, thus establishing a link between reproductive behaviors and migratory transitions. Objective: The present study aims to analyze how migration affects motherhood and the role played by country of citizenship. Although most of the literature has focused on analyzing post-immigration fertility behaviors, in the present work we follow the women for their entire fertility period. Methods: The data were collected in the 2010 ORIM survey, conducted by the Region of Lombardy and the Ismu Foundation. The survey covered about 8,000 immigrants in Lombardy, of whom 3,848 were women, age 14 years and over...