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Dr Maryam.  At the onset of labor, assessment of the fetal presentation with respect to the maternal birth canal is critical to the route of delivery.

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Presentation on theme: "Dr Maryam.  At the onset of labor, assessment of the fetal presentation with respect to the maternal birth canal is critical to the route of delivery."— Presentation transcript:

1 Dr Maryam

2  At the onset of labor, assessment of the fetal presentation with respect to the maternal birth canal is critical to the route of delivery.  At term, the vast majority of fetuses present in the vertex presentation, where the fetal head is flexed so that the chin is in contact with the fetal thorax. The fetal spine typically lies along the longitudinal axis of the uterus. Dr Maryam

3  Nonvertex presentations (including breech, transverse lie, face, brow, and compound presentations) occur in less than 4% of fetuses at term. Dr Maryam

4  Malpresentation of the vertex presentation occurs if there is:  deflexion the fetal head leading to brow or  extension of the fetal head leading to face presentation Dr Maryam



7  The fetal head and neck are hyperextended, causing the occiput to come in contact with the upper back of the fetus while lying in a longitudinal axis.  The presenting portion of the fetus is the fetal face between the orbital ridges and the chin.  The fetal chin (mentum) is the point designated for reference during an internal examination through the cervix. Dr Maryam

8  Multiple gestations  Grand multiparity  Fetal malformations  Prematurity  Cephalopelvic disproportion (CPD) Dr Maryam

9  Face presentation is diagnosed late in the first or second stage of labor by examination of a dilated cervix.  On digital examination, the distinctive facial features of the mouth and nose, the malar bones, and particularly the orbital ridges can be palpated.  This presentation can be confused with a breech presentation because the mouth may be confused with the anus and the malar bones or orbital ridges may be confused with the ischial tuberosities. Dr Maryam

10  Like the occiput, the mentum can present in any position relative to the maternal pelvis.  For example: if the mentum presents in the left anterior quadrant of the maternal pelvis, it is designated as left mentum anterior (LMA). Dr Maryam




14  The fetal head is midway between full flexion (vertex) and hyperextension (face) along a longitudinal axis.  The presenting portion of the fetal head is between the orbital ridge and the anterior fontanel. The face and chin are not included. Dr Maryam

15  generally similar to those causing a face presentation and include:  cephalopelvic disproportion (CPD) or pelvic contracture  increasing parity  prematurity Dr Maryam

16  More than 50% of brow presentations will convert to vertex or face presentation and labor courses are managed accordingly when spontaneous conversion occurs. Dr Maryam

17  Close observation of labor progression because cephalopelvic disproportion (CPD), dysfunctional labor, and prolonged labor are much more common.  Continuous electronic fetal heart rate monitoring is considered mandatory. Dr Maryam

18  Fetuses with face presentation with anterior mentum position can be delivered vaginally  Cesarean delivery is performed for the usual obstetrical indications, including:  arrest of labor  nonreassuring fetal heart rate pattern  Other positions Dr Maryam

19  The persistent brow presentation has a poor prognosis for vaginal delivery unless the fetus is small or the maternal pelvis is large.  Expectant management is reasonable if labor is progressing well and the fetal well-being is assessed, as there can be spontaneous conversion to face or vertex presentation.  The persistent brow presentation necessitates cesarean section delivery. Dr Maryam


21 EARLY LABOUR  Ideally, every breech delivery should take place in a hospital with surgical capability.  Attempt external version if:  Breech presentation is present at or after 37 weeks (before 37 weeks, a successful version is more likely to spontaneously revert back to breech presentation)  Vaginal delivery is possible  Membranes are intact and amniotic fluid is adequate  There are no complications (e.g. fetal growth restriction, uterine bleeding, previous caesarean delivery, fetal abnormalities, twin pregnancy, hypertension, fetal death).  If external version is successful, proceed with normal childbirth.  If external version fails, proceed with vaginal breech delivery or caesarean section Dr Maryam


23  A vaginal breech delivery by a skilled health care provider is safe and feasible under the following conditions:  complete or frank breech  adequate clinical pelvimetry  fetus is not too large  no previous caesarean section for cephalopelvic disproportion (CPD)  flexed head. Dr Maryam

24  Examine the woman regularly and record progress on a partograph.  Continuous FHR monitoring  If the membranes rupture, examine the woman immediately to exclude cord prolapse Dr Maryam

25  Spontaneous delivery to the umbilicus  Gentle traction on cord may have effect opposite to that desired  Up to four minutes from delivery of the umbilicus to complete delivery associated with Apgar scores of > 7 at 5 minutes  If legs do not deliver spontaneously can be assisted by Pinard manoeuvre  Note: Trapped head Duhrssen incisions 10 and 2 o’clock Dr Maryam

26 Pinard manoeuvre Dr Maryam

27 Placement of the fingers during traction Dr Maryam

28 Delivery of the arms - Lövset manoeuvre Dr Maryam

29 Mauriceau-Smellie-Viet manoeuvre Dr Maryam

30 Forceps to the aftercoming head Dr Maryam

31  The cord prolapses and delivery is not imminent, deliver by caesarean section.  There are fetal heart rate abnormalities (less than 100 or more than 180 beats per minute) or prolonged labor, deliver by caesarean section. Dr Maryam


33  A caesarean section is safer than vaginal breech delivery and recommended in cases of:  footling breech  small or malformed pelvis  very large fetus  previous caesarean section for cephalopelvic disproportion (CPD)  hyperextended or deflexed head. Dr Maryam

34  cord prolapse  birth trauma as a result of extended arm or head, incomplete dilatation of the cervix or cephalopelvic disproportion ( CPD )  asphyxia from cord prolapse, cord compression, placental detachment or arrested head  damage to abdominal organs  broken neck Dr Maryam


36  If the woman is in early labour and the membranes are intact, attempt external version:  If external version is successful, proceed with normal childbirth;  If external version fails or is not advisable, deliver by caesarean section.  Monitor for signs of cord prolapse. If the cord prolapses and delivery is not imminent, deliver by caesarean section. Dr Maryam

37  The fetal head has been delivered but the shoulders are stuck and cannot be delivered Dr Maryam

38 “…a delivery that requires additional obstetric maneuvers following failure of gentle downward traction on the fetal head to effect delivery of the shoulders.” ACOG, Practice Bulletin 40 (November 2002) Dr Maryam

39  Complications can include: 1. Brachial plexus injury (overaggressive traction) 2. Impaired respiration  fetal hypoxia 3. Cord compression  compromised fetal circulation Dr Maryam

40  Be prepared for shoulder dystocia at all deliveries, especially if a large baby is anticipated.  Have several persons available to help. Dr Maryam


42  The fetal head is delivered but remains tightly applied to the vulva.  The chin retracts and depresses the perineum.  Traction on the head fails to deliver the shoulder, which is caught behind the symphysis pubis. Dr Maryam


44 Identify antepartum risk factors  Identify and report deviations from normal labor progress  Prepare for potential shoulder dystocia  Personnel  Supplies  Empty maternal bladder  Maternal positioning for birth Dr Maryam

45  Observe for “turtle sign”(after delivering the infant’s head, it retracts tightly against the perineum) or obvious resistance of the anterior shoulder  Document emergence of head  Call for help if not already there ( Code Blue )  Document any additional maneuvers attempted  Assist with maternal positioning  McRoberts  Suprapubic pressure (in direction indicated by provided)  Support mother about bearing down when instructed by provider  Record sequence and timing of events during birth  Accurately label fundal vs. suprapubic pressure in documentation Dr Maryam



48  Prepare for immediate surgical birth  Continuously monitor fetus during the Zavanelli maneuver until birth Dr Maryam

49 Assess for  Hematoma  Uterine atony  Excessive bleeding  Bladder injury  Rectal injury  Provide explanations to family as needed  Document birth events Dr Maryam

50  Neonatal resuscitation as needed  Assess for broken clavicle  Assess for brachial plexus injury Dr Maryam

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