Fig. 1From: In vitro fertilization with frozen embryo transfer increased histamine-mediated contractile sensitivity via PKCβ in human umbilical veinHistamine-mediated contractile responses in HUV from normal pregnancy and the pregnancy who received frozen embryo transfer (A) Potassium chloride (KCl)-mediated constrictions in HUV. (B) Contractile responses to accumulated concentrations of histamine in HUV. (C) LogEC50 of the contractile responses caused by histamine in HUV. (D) The concentration of histamine in human umbilical plasma. (E) The real-time records of histamine-induced constriction in HUV. Ctrl, normal pregnancy. Frozen-ET, the pregnancy who received the frozen embryo transfer. Inter-group comparison, #, p < 0.05; ##, p < 0.01; ###, p < 0.001Back to article page