Were obtained from a representative number of women belonging to each of the pregnant groups, either during cesarean sections or immediately after delivery. For villous RNA studies, dissections of the chorionic plate were collected from three distinct locations on the placental surface as recommended (Roberts et al., 2019 (link)), submerged, and stored in RNA Later Solution (ThermoFisher Scientific). RNAs were isolated as previously described (Aharon et al., 2005 (link)), using Tri-reagent (Sigma-Aldrich Israel LTD) following a standard procedure.
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