Uterine Contractions: Every 3 to 4 minutes, lasting 60 to 80 seconds, with an intensity of 75 to 90 mm Hg and resting tone of 20 to 25 mm Hg. Normal uterine resting tone is between 10 to 15 mm Hg.Click to see full answer. In this manner, what is resting tone?In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial contraction of the muscles, or the muscle’s resistance to passive stretch during resting state. It helps to maintain posture and declines during REM sleep.Subsequently, question is, what is normal intrauterine pressure? An intrauterine pressure catheter (IUPC) is a device placed into the amniotic space during labor in order to measure the strength of uterine contractions. External tocodynamometers are used to measure tension across the abdominal wall and detect only contraction frequency and duration. Similarly, it is asked, what is resting tone in labor? In a normal labor, one contraction every two to three minutes or less than five contractions in a 10 minute period is ideal. A uterus must rest between contractions, having sufficient uterine resting tone (soft to the touch), and uterine resting time (about one minute).How many mmHg is a strong contraction?Figure 1: Regular uterine contractions recorded in the first stage of labor. The duration of uterine contraction is about one min and the interval also one min, i.e. the contraction cycle expressed by contraction peak-to-peak time is about two min. The contraction intensity is 30 to 40 mmHg .