Fig. 4: Maternal transfer of PS NPs.
From: Size-dependent translocation of polystyrene nanoplastics across biological barriers in mammals
The percentage of 14C in the a placenta, b fetus, and c milk on days 1–19 post the administration of PS20 or PS100 via oral gavage (OG), intratracheal aerosolization (ITA), or intravenous injection (IVI). As delivery occurred on day 5 post-administration, there are only two time points (days 1 and 5) for the distribution of PS NPs in the a placenta and b fetus. Since the x-axis denotes the time elapsed post-administration of PS NPs and delivery occurred on day 5 post-administration, the time points in c correspond to days 1, 3, 7, and 14 postpartum (i.e., days 6, 8, 12, and 19 post-administration). All data (mean ± standard deviation, n = 3) are displayed as the percentage of 14C radioactivity in the placenta, fetus, or milk normalized to the total radioactivity of 14C administered to the rats. Data points partially obscured below the x-axis represent values below the limit of quantification [(2.8 × 10−4)% of initial dose]. All data points include error bars, some of which are small and obscured by the data point symbols.
