To determine whether reduced FasL expression was attributable to reduced TSG101+ exosomes, FasL expression was normalized to TSG101 and showed that despite significantly fewer exosomes in IUGR compared to P (Fig. 6A ii), FasL/TSG101 expression was comparable to P, and greater than NP (Fig. 6C iii). This evidence concerns the gene TSG101 and fetal growth restriction.