Fig. 3From: Translocation of (ultra)fine particles and nanoparticles across the placenta; a systematic review on the evidence of in vitro, ex vivo, and in vivo studiesPie charts describing the characteristics of the animal studies included in the review. In vivo maternal-fetal particle transfer was assessed in animal models (a) exposed to (ultra)fine particles and NPs via different methods of administration (b). NPs: nanoparticlesBack to article page