Revisiting the Healthy Migrant Paradox in Perinatal Health Outcomes Through a Scoping Review in a Recent Host Country.

Ample evidence shows that, in many developed countries, immigrants have similar or better perinatal health outcomes than natives despite facing socioeconomic disadvantages in the host country ("healthy migrant paradox" -HMP). This scoping review aims to: (1) summarize the literature on perinatal health among immigrants and natives in Spain and (2) examine whether there is evidence of the HMP in a context of recent migration. A total of 25 articles published between 1998 and 2014 were reviewed. Overall, we found evidence of the HMP in low birthweight and to a lesser extent in preterm, though the patterns vary by origin, but not in macrosomia and post-term. The results are consistent across settings, levels of adjustment, and birth year. Policies should be oriented towards identifying the modifiable risk factors leading to a higher risk of macrosomia and post-term among immigrants.