Figure 1.

Overview of samples analyzed and correlation analyses performed. Samples examined in the study are: dry blood samples (DBS) for children at birth and blood for women during pregnancy and children at 6 months, 18 months, and 6 years. Correlation analysis for the study of mother-mother temporal stability ($n=672$) and mother-child vertical transfer from mid pregnancy week 24 ($n=664$) and 1 week postpartum ($n=661$) (in green), and correlation analysis for the study of the permanence of transfer from birth to 6 months ($n=583$), 18 months ($n=588$), and 6 years of age ($n=496$) of the child (in red).