Abnormalities of the powers uterine inertia Ultrasound Doppler Uterine contraction frequency 3.diagnosis Palpation: Fetal heart strength Uterine contraction frequency and duration duration strength-millimeters Strain gauge resting uterine tone Internal ntrauterine pressure (pressure) Monitoring catheter frequency ocodynamometer Vaginal examination Fetal heart rate long- and short-term Fetal scalp JRE 7.1- Tocodynamometers and intrauterine pressure catheters8 RENJI HOSPITAL Abnormalities of the powers -----uterine inertia 3.diagnosis Palpation: strength duration frequency Tocodynamometer Vaginal examination