1 ABNORMAL LABOR OR DYSTOCIA 2Defintion ：Dystocia is defined as difficult labor.It may be associated with various abnormalities that prevent or deviate from the normal course of labor and delivery.It is the consequence of four distinct abnormalities that may exist singly or combination: the power, passage passenger and the psyche.3Cause of dystociaPowerPassagePassengPsyche4Diagnosis: prolonged courses of labor.Lack of progressive cervical dilatation and fetus descending.prolonged latent phase >16h 。prolonged active phase >8hCervical dilation: Primigravida<1.2cm/h ，Multipara <1.5cm/h 。5Protracted active phase The cervical dilation stop for 2 hours in active phase 。Prolonged second stageThe second stage last more than 2 hours for primigravida or more than 1 hour for multipara 。6Prolonged descent: the rate of fetus descending in deceleration phase and the second stage of labor less than 1.0cm/h(primigravida) ， or 2.0cm/h(multipara) 。Protracted descent: fetus descending in deceleration phase stop for more than 1h 。 Prolonged labor: the total stage last more than 24h 。789 Abnormal uterine actionThe rhythm, symmetry, polarity and retraction of uterine contraction become abnormal.Include ：uterine hypocontractility uterine hypercontractility10Abnormalities of the powers Uterine dysfunction coordianted hypocontractility Uterine Uncoordinated Dysfunction coordianted hypercontractility uncoordinated Uterine dysfunction coordianted hypocontractility Uterine Uncoordinated Dysfunction coordianted hypercontractility uncoordinated11Etiology of uterine action ：Cephalopelvic disproportion or fetal malposition Psychological factorsAbnormal uterus Endocrinal dysfunctionOthers12Clinical manifestation1.Hypotonic uterine action(coordianted) ★Have normal ...
