171059.fig.002a
(a)
171059.fig.002b
(b)
171059.fig.002c
(c)
171059.fig.002d
(d)
Figure 2: Effects of Hoodia spray on spontaneous ((a) and (c)) and KCl-stimulated ((b) and (d)) contractility of uterine rings from nonpregnant ((a) and (b)) and late-pregnant ((c) and (d)) animals. Experiments were performed in the presence (■) and absence (□) of propranolol. *, **, and *** indicate , , and , respectively.