H19 and hydrops fetalis: Considering that HF-MSCs-Exo can deliver lncRNA H19 to HaCaT cells through exosomes, the modulatory function of exosomes in proliferation, migration, and apoptosis of HaCaT cells was investigated by incubating HaCaT cells with normal HF-MSCs-Exo (NC) or HF-MSCs-Exo overexpressing H19 (OE-H19) or having downregulated levels H19 (sh-H19).