Fig. 3.

A – Immediate effects of oxytocin on [Ca²⁺]_i in myometrial slice: increase in duration and amplitude of the global [Ca²⁺]_i transients and induction of [Ca²⁺]_i oscillations in some cells; application of 10 nM oxytocin started at 5 min and was maintained for two hours. B – Established effect of oxytocin: augmentation of global [Ca²⁺]_i transients and cessation of [Ca²⁺]_i oscillations; same slice incubated with 10 nM oxytocin for 1 h.