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Background: Immigrants in Germany exhibit higher levels of social disadvantage when compared to the non-immigrated population. Turkish-origin immigrants constitute an important immigrant group in Germany and show disparities in some health domains that are evident from birth onwards. Several studies have shown the mechanisms by which social disadvantage is biologically embedded to affect health over the lifespan. Relatively little, however, is still known about if and how the maternal social situation is transmitted to the next generation. This study therefore aims to analyse the effects of maternal socioeconomic status and migration status on stress-related maternal-placental-fetal (MPF) biological processes during pregnancy on infant birth and health outcomes.
Methods: This longitudinal cohort study of Nā=ā144 child-mother dyads is located at two study sites in Germany and includes pregnant women of Turkish origin living in Germany as well as pregnant German women. During pregnancy, MPF stress biology markers from maternal blood and saliva samples, maternal socio-economic and migration-related information, medical risk variables and psychological well-being are assessed. After birth, infant anthropometric measures and developmental outcomes are assessed. The same measures will be assessed in and compared to Turkish pregnant women based on a collaboration with BABIP study in Istanbul.
Discussion: This is the first study on intergenerational transmission of health disparities in Germany with a focus on women of Turkish-origin. The study faces similar risks of bias as other birth cohorts do. The study has implemented various measures, e.g. culturally sensitive recruitment strategies, attempt to recruit and follow-up as many pregnant women as possible independent of their social or cultural background. Nevertheless, the response rate among lower-educated families is lower. The possibility to compare results with a cohort from Turkey is a strength of this study. However, starting at different times and with slightly different recruitment strategies and designs may result in cohort effects and may affect comparability of the sub-cohorts.
Background:Turkish-origin immigrants constitute one of the biggest migration groups in Germany where they exhibit higher levels of social disadvantage when compared to the majority population. Research has elucidated the underlying mechanisms by which social disadvantage is biologically embedded to impact health over the lifespan. However, relatively little is known about how its effects are transmitted across generations.
Aims of the study: To elucidate the effects of maternal migration status and socioeconomic status on stress-related maternal-placental-foetal (MPF) biological processes across gestation and on subsequent infant birth and health outcomes.
Methods: We are conducting a longitudinal cohort study of N = 450 child-mother dyads with serial measures across gestation and birth through the first year of life. Our proposed study population will include approximately equal numbers of Turkish-origin women in Germany, German women in Germany, Turkish women living in Turkey and their offspring. Study visits are conducted from the second trimester of pregnancy to the end of the first year of life to assess maternal socio-economic and migration-related information, psychological well-being, nutrition, medical risk variables, and MPF stress biology markers from maternal blood and saliva samples. Infant anthropometric measures, developmental outcomes and stress markers in saliva are assessed throughout the first year of life.
Analyses: We will test specific hypotheses regarding the association between migration background, socioeconomic status and MPF stress biology. We will furthermore quantify the association of maternal migration background- and social disadvantage-related MPF stress biology measures on pregnancy and child health outcomes.
Discussion: This is the first study on foetal programming of health disparities with a focus on Turkish-origin women in Germany. The significance and impact of this study derives from the importance of achieving a better understanding of underlying mechanisms that alter disease vulnerability in minority and disadvantaged populations.