The reproductive care of pregnant migrants entering the European Union via its Mediterranean borders represents an under-examined topic, despite a growing scholarly emphasis on female migrants and the gendered aspects of migration in the past three decades. This article uses ethnographic data gathered in Greece, Italy, and Spain to examine pregnant migrants’ experiences of crossing, first reception, and reproductive care. The authors discuss their findings through the conceptual lens of vulnerability, which they understand as a shifting and relational condition attributed to, or dynamically endorsed by, migrant patients within given social contexts and encounters. They explore how declinations of ideas of vulnerability shape the medical encounter between healthcare professionals and migrant women and how vulnerability is used by migrant patients to engage in meaningful social relations in unpredictable and unstable dynamically used or contested borderlands.