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Uterine perivascular adipose tissue: A novel regulator of uterine artery hemodynamics during normal pregnancy

During pregnancy, uterine artery (UtA) blood flow increases compared to non‐pregnant state, in part due to reductions in uterine artery tone. The main objective of this study was to determine the role of adipose tissue surrounding UtA (perivascular adipose tissue, PVAT) in pregnancy‐induced changes in UtA blood flow and vasodilatory capacity. We hypothesized that uterine PVAT augments UtA blood flow and potentiates UtA dilatory responses in pregnant rats. Also, we hypothesized that pregnancy induces distinct changes in uterine PVAT morphology and gene expression as compared to other adipose depots.