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Nanoparticle Tracking Analysis size distribution profiles (mean data n = 8) for maternal side placental perfusate derived samples collected at the following stages of the fractionation process. (A) 2 × 1500×g supernatant (1500SN), (B) 150,000×g supernatant (150KSN), (Ci) 10,000×g pellet (10KP) and 150,000×g pellet (150KP). (Cii) Transmission electron micrographs of 10KP and 150KP. Scale bars represent 200 nm.
