<qa>  What is the level of desensitization of human myometrium following exposure toThe results of this study will provide insight into the level of desensitization of human myometrium following exposure to pulsatile oxytocin. Based on oxytocin dose-response curves after pretreatment to continuous oxytocin and pretreatment to pulsatile oxytocin, we will be able to determine the extent of desensitized myometrium following each delivery method. 