Currently delivery normal or eutocico, should be diri & gone through modern techniques and with the use of drugs appropriate to ensuring that their duration is the minimum possible, with lower risk and maximum pain attenuation; all benefit. the binomial Muki German and into a really physiological process. The force uterine normal can calculate is with a system of catheter intrauterine (transducer) _ of that way the tone of resting basal normal, is less to 5 Torr to the beginning of the phase of latency and increases of 10 to 12 Torr in the phase active (1). Labour increases the strength and frequency of uterine contractions; allowing a progression fast until the expulsion of the fetus. Advancing cervical dilation during childbirth; It reduces total uterine activity spent by every cm. forward. So, it is necessary to take this increase in efficiency of uterine labor to assess factors such ...