Midwife Licensure Exam Normal Pregnancy, Labor & Postpartum — Normal Labor & DeliveryDetailed Explanation

The Five Ps of Labor

Labor success depends on five interacting components called the Five Ps. Think of it as a 'checklist' that determines whether labor will progress normally or develop dystocia (abnormal/difficult labor). **1. Passenger (the Fetus):** The fetus must navigate the birth canal, and its characteristics greatly affect labor progress. - **Lie**: Relationship of the fetal spine to the maternal spine. A *longitudinal lie* (both spines are parallel) is normal and favorable. A transverse lie is abnormal and requires cesarean delivery. - **Presentation**: The body part entering the pelvis first. *Cephalic/vertex* (head first) is ideal and most common (~96%). Breech (buttocks/feet first) and shoulder presentations are complications. - **Position**: Relationship of the fetal presenting part (specifically a bony landmark called the denominator) to the maternal pelvis. The most common and favorable position is **LOA — Left Occiput Anterior** (the back of the fetal head faces the left front of the mother's pelvis). This allows the smallest fetal head diameter to present. - **Attitude**: Degree of fetal flexion. *Complete flexion* (chin on chest) is ideal because it presents the smallest diameter of the head (suboccipitobregmatic, ~9.5 cm). Extension increases the presenting diameter and makes delivery more difficult. - **Size (Fetal)**: Macrosomia (large baby) or hydrocephalus can cause cephalopelvic disproportion (CPD). **2. Passage (Birth Canal):** Includes the bony pelvis and soft tissues (cervix, vagina, pelvic floor). The *gynecoid pelvis* (round inlet) is the most favorable type for vaginal delivery. An android (heart-shaped, male-type) or platypelloid (flat) pelvis increases the risk of dystocia. **3. Powers (Uterine Forces):** - *Primary power*: Uterine contractions — responsible for effacement and dilation. Contractions are assessed by frequency (onset to onset), duration (start to end of one contraction), intensity (mild/moderate/strong), and resting tone. - *Secondary power*: Voluntary maternal pushing (bearing down with abdominal muscles) — active only in the second stage after full dilation. **4. Position (Maternal):** Upright positions (walking, sitting, squatting) use gravity to aid fetal descent. The *left lateral (left Sims) position* improves placental perfusion by relieving aortocaval compression. Avoid prolonged supine positioning (causes supine hypotension syndrome). **5. Psyche (Psychological State):** Fear, anxiety, and lack of support increase the perception of pain and can cause catecholamine release, which reduces uterine contractility and placental blood flow. Continuous labor support (from a nurse, midwife, doula, or family companion) has been shown to shorten labor and reduce analgesia needs.

Signs of Labor: True vs. False Labor and Premonitory Signs

Before true labor begins, the body sends preparatory signals called **premonitory (pre-labor) signs**. Recognizing these — and distinguishing true labor from false labor — is a critical nursing assessment skill, especially at triage. **Premonitory Signs (1–4 weeks before labor):** - **Lightening (Engagement):** The fetal head descends into the pelvic inlet. The mother notices easier breathing (the uterus drops away from the diaphragm) but increased urinary frequency (pressure on the bladder). In primigravidas, this occurs 2–4 weeks before labor. In multigravidas, it may not happen until labor begins. - **Braxton Hicks Contractions:** Irregular, painless 'practice' contractions that do not cause cervical change. They increase in frequency near term but do not intensify with activity. - **Cervical Ripening:** The cervix softens (Goodell's sign), effaces, and begins to dilate slightly in preparation. - **Bloody Show:** Passage of blood-tinged mucus as the mucus plug (operculum) is dislodged from the cervical os. This is a reliable sign that labor is approaching within 24–72 hours. - **Nesting/Energy Burst:** A sudden increase in energy and urge to clean and organize — counsel patients not to overexert. - **Slight Weight Loss (0.5–1.5 kg):** Due to estrogen-mediated fluid excretion as progesterone levels drop. **True vs. False (Braxton Hicks) Labor — The Key Clinical Distinction:** The ONLY definitive way to confirm true labor is **progressive cervical dilation and effacement** on sterile vaginal examination. | Feature | TRUE Labor | FALSE Labor | |---|---|---| | Contractions | Regular, progressively closer, stronger, longer | Irregular, no progressive pattern | | Effect of walking | Contractions INTENSIFY | Contractions ease or stop | | Location of discomfort | Starts in BACK, radiates to abdomen (fundus-dominant) | Mostly lower abdomen | | Cervical change | Progressive dilation + effacement | NO change | | Bloody show | Usually present | Usually absent | | Fetal movement | May increase initially | No change | **Rupture of Membranes (ROM):** May occur before labor (PROM) or during labor. Amniotic fluid is clear, odorless, and slightly alkaline (turns nitrazine paper BLUE — pH 7.0–7.5). Urine is acidic (yellow on nitrazine). A fern pattern under microscopy also confirms amniotic fluid. When ROM occurs, check FHR IMMEDIATELY to rule out cord prolapse.

Stages and Phases of Labor

Labor is divided into four stages, each with distinct characteristics and specific nursing priorities. Understanding the normal parameters for each stage is essential for recognizing deviations and applying the nursing process correctly. **FIRST STAGE: Onset of true labor → Full cervical dilation (10 cm)** This is the longest stage, particularly in primigravidas. It has three phases: **Latent Phase (0 to ~3–4 cm; some sources: up to 6 cm)** - Contractions: mild to moderate, every 5–10 minutes, lasting 20–40 seconds - Duration: up to 20 hours in primigravidas; up to 14 hours in multigravidas (prolonged if exceeded) - Maternal behavior: talkative, excited, able to cope; sociable - Nursing care: encourage ambulation, oral hydration, relaxation techniques, reassurance **Active Phase (~4–7 cm)** - Contractions: moderate to strong, every 3–5 minutes, lasting 40–60 seconds - Expected dilation rate: ≥1 cm/hour in primigravidas; ≥1.2–1.5 cm/hour in multigravidas - Maternal behavior: serious, inward-focused, needs support and pain management - Nursing care: continuous monitoring, analgesia/epidural placement often occurs here, encourage left lateral positioning **Transition Phase (8–10 cm)** - Contractions: strong, every 2–3 minutes, lasting 60–90 seconds; minimal rest between contractions - Maternal behavior: exhausted, irritable, possibly nauseated, trembling, diaphoretic; may say 'I can't do this anymore' - KEY POINT: Strong urge to push (rectal pressure), but the patient MUST NOT PUSH until full dilation (10 cm) — premature pushing causes cervical edema and lacerations - Nursing care: coach breathing techniques (panting/blowing), provide firm reassurance ('You are almost there!'), assess for complete dilation before allowing pushing **SECOND STAGE: Full dilation (10 cm) → Birth of the baby** - Characterized by the involuntary urge to push with contractions - Duration: up to 2 hours in primigravidas; up to 1 hour in multigravidas (with epidural, up to 3 hours) - Open-glottis/spontaneous pushing is preferred over sustained Valsalva pushing - Crowning occurs (largest diameter of the head visible at the introitus) - Nurse assists with controlled delivery of the head to prevent perineal trauma - Note and record the EXACT time of birth - Assign Apgar scores at 1 and 5 minutes - Check for nuchal cord (cord around the neck) upon head delivery **THIRD STAGE: Birth of baby → Delivery of placenta** - Usually 5–30 minutes (prolonged if >30 minutes — risk of hemorrhage) - Signs of placental separation (the Four Signs): 1. Sudden GUSH of blood from the vagina 2. LENGTHENING of the umbilical cord at the introitus 3. GLOBULAR and firm change in uterine shape (fundus rises) 4. Fundus rises upward in the abdomen - DO NOT pull the cord — use controlled cord traction (Brandt-Andrews maneuver) ONLY after placental separation and with a contracted uterus - Inspect placenta for completeness (3 vessels in cord: 2 arteries + 1 vein; missing cotyledons = retained fragments) - Placental delivery mechanisms: **Schultze** (shiny fetal surface presents first — most common, ~80%) or **Duncan** (dull maternal surface/edge presents — 'Dirty Duncan') - Administer oxytocin (uterotonic) per protocol after delivery of the anterior shoulder (or after placental delivery) **FOURTH STAGE: Delivery of placenta → 1–2 hours postpartum** - Recovery period; HIGHEST RISK for postpartum hemorrhage (PPH) - Uterine atony is the leading cause of PPH (TONE is the first T in the 4 Ts: Tone, Trauma, Tissue, Thrombin) - Monitor every 15 minutes in the first hour: fundus (firm, midline, at/below umbilicus), lochia (rubra, amount), perineum (REEDA), vital signs, bladder - BOGGY (soft/flaccid) UTERUS = first sign of uterine atony → MASSAGE the fundus FIRST - Encourage early breastfeeding (stimulates oxytocin release → uterine contraction) - Ensure bladder emptying (full bladder displaces uterus, prevents contraction → PPH risk)

Cardinal Movements (Mechanisms) of Labor

The cardinal movements describe how the fetal head passively adapts and rotates through the bony pelvis during the second stage of labor. These movements occur in a specific sequence and are essential for the fetus to navigate the irregular shape of the pelvic inlet, midcavity, and outlet. They are tested in the NLE as both recall and application questions. The seven cardinal movements in order are: 1. **ENGAGEMENT:** The biparietal diameter (BPD — the widest transverse diameter of the fetal head) passes through the pelvic inlet. Engagement is described by **station** — the relationship of the presenting part to the ischial spines. When the head is at the level of the ischial spines = **Station 0** (engaged). Above = negative stations (-1 to -5); below = positive stations (+1 to +5). Station +4/+5 = crowning. 2. **DESCENT:** The fetal head moves downward through the pelvis. This is the primary movement throughout all of labor. Without descent, delivery cannot occur. Assessed clinically by station. 3. **FLEXION:** As the head descends and meets the pelvic floor resistance, the chin flexes onto the chest. This presents the smallest diameter (suboccipitobregmatic, ~9.5 cm) to the birth canal. 4. **INTERNAL ROTATION:** The occiput rotates from its original position (usually LOA/LOT) anteriorly to face the maternal symphysis pubis (OA — occiput anterior). This aligns the head with the longest diameter of the pelvic outlet. In LOA, the head rotates 45°; in LOT, it rotates 90°. 5. **EXTENSION:** As the head passes under the symphysis pubis at the outlet, it extends (the neck extends beneath the pubic arch). This delivers the head: first the occiput, then brow, nose, mouth, and chin sweep over the perineum. 6. **EXTERNAL ROTATION (RESTITUTION):** After the head is delivered, it rotates back to align with the fetal shoulders (which are entering the pelvis). The occiput rotates back to the side from which it came (LOA → occiput returns to the left). This is called restitution. 7. **EXPULSION:** Delivery of the anterior shoulder (under the symphysis pubis) first, then the posterior shoulder, then the rest of the body. **Mnemonic:** ***Every Decent Family In Elk Ridge Enjoys*** (Engagement, Descent, Flexion, Internal rotation, Extension, External rotation, Expulsion) **Nursing Role During Second Stage:** - Assist with controlled delivery of the head during extension to prevent rapid expulsion and perineal lacerations - Check for NUCHAL CORD (cord around the neck) as the head delivers; if present and loose, slip it over the head; if tight, double-clamp and cut before delivering the shoulders - Apply gentle downward traction to deliver the anterior shoulder, then upward traction for the posterior shoulder - Note exact time of birth for documentation and Apgar timing

Fetal Heart Rate (FHR) Monitoring and Nursing Interventions

Electronic fetal monitoring (EFM) is the continuous assessment of FHR patterns and uterine contractions to evaluate fetal oxygenation during labor. Interpreting FHR patterns accurately and responding appropriately is one of the most critical — and most tested — intrapartum nursing skills. **Normal FHR Parameters:** - **Baseline FHR: 110–160 bpm** (measured over a 10-minute period, excluding accelerations/decelerations) - **Baseline variability** (beat-to-beat fluctuation around the baseline): - Absent: undetectable amplitude — MOST CONCERNING - Minimal: ≤5 bpm — concerning if persistent - **Moderate: 6–25 bpm — NORMAL; indicates intact fetal nervous system and good oxygenation** - Marked: >25 bpm **Reassuring FHR signs:** normal baseline (110–160), moderate variability, presence of accelerations, absence of late/variable decelerations. **Accelerations:** - Abrupt increase in FHR above baseline, lasting ≥15 seconds with peak ≥15 bpm above baseline (in term fetuses) - Always REASSURING — indicates fetal well-being and intact neurological response **Decelerations (The Critical Three):** **1. EARLY DECELERATIONS** - Shape: Uniform, mirror image of the contraction (gradual onset and return) - Timing: Begin and end WITH the contraction - Cause: **Fetal head compression** → vagal stimulation → temporary bradycardia - Clinical significance: **BENIGN** — no intervention required; continue monitoring - Clinical clue: 'E for Early = hEad = bEnign' **2. VARIABLE DECELERATIONS** - Shape: Abrupt, V-shaped, variable in timing and appearance - Timing: Variable — may be before, during, or after a contraction - Cause: **Umbilical cord compression** → sudden decrease in FHR - Clinical significance: Can be benign if brief and not repetitive; CONCERNING if persistent, severe (below 70 bpm for >60 seconds), or not recovering - **Nursing interventions (intrauterine resuscitation):** REPOSITION to the left lateral or knee-chest position (relieves cord compression), give OXYGEN by mask, increase IV fluids, assess for cord prolapse **3. LATE DECELERATIONS** - Shape: Uniform, gradual — mirror of contraction BUT DELAYED (onset after contraction peak) - Timing: Begin AFTER the contraction peak; the lowest point occurs after the contraction; return to baseline AFTER contraction ends - Cause: **Uteroplacental insufficiency (UPI)** — the placenta cannot deliver adequate oxygen during the peak of a contraction - Clinical significance: **OMINOUS — always concerning and always requires intervention** - Clinical clue: 'L for Late = pLacenta = aLarm!' **PRIORITY NURSING ACTIONS FOR FETAL DISTRESS (Late and Significant Variable Decelerations):** The 'Intrauterine Resuscitation Bundle' — perform in this order: 1. **STOP oxytocin infusion** (if running) — removes the cause of increased uterine activity 2. **REPOSITION** to the **LEFT LATERAL** position (or knee-chest for cord prolapse) 3. **Give OXYGEN** by face mask at **8–10 L/min** 4. **Increase IV fluid rate** (corrects hypotension; improves placental perfusion) 5. **NOTIFY the physician/midwife** — report findings and await orders 6. Prepare for possible operative delivery if pattern does not resolve **Contraction Assessment (Uterine Monitoring):** - **Frequency:** Start of one contraction to the start of the NEXT contraction - **Duration:** Start to end of ONE contraction - **Intensity:** Mild (uterus indents easily), moderate, strong (board-like, cannot indent) - **Resting tone:** Uterus should relax completely between contractions - **HYPERSTIMULATION:** Contractions <2 minutes apart, duration >90 seconds, or no uterine relaxation between contractions = STOP OXYTOCIN IMMEDIATELY (risk of fetal hypoxia and uterine rupture)

Pharmacology in Labor: Oxytocin, Analgesia, and Anesthesia

Pharmacological management of labor involves agents that promote uterine contractions (oxytocics), manage pain (analgesics/anesthetics), and treat complications. NLE questions on this topic test both knowledge of the drugs and priority nursing actions when complications occur. **1. OXYTOCIN (Pitocin, Syntocinon)** *Mechanism:* Synthetic posterior pituitary hormone that stimulates uterine muscle contractions and milk ejection (let-down reflex). *Uses in Labor:* - **Labor induction:** Starting labor artificially when it hasn't begun - **Labor augmentation:** Stimulating stronger/more frequent contractions when labor has slowed - **Postpartum (3rd/4th stage):** Contracts the uterus to prevent/treat PPH *Critical Administration Rules (HIGH-ALERT DRUG):* - **ALWAYS given as a DILUTE IV INFUSION via an infusion pump** during labor induction/augmentation — titrated gradually based on contraction and FHR response - **NEVER given IV push (bolus) for labor induction** — rapid administration causes severe hypotension and uterine hyperstimulation - After delivery: 10 units IM (most common) OR added to IV fluids per protocol for PPH prevention *Monitoring:* - Contraction frequency, duration, intensity, and resting tone - FHR pattern (for late/variable decelerations) - Maternal BP and urine output (oxytocin has an antidiuretic effect at high doses) *Side effects/complications:* - **Uterine hyperstimulation** (contractions <2 min, >90 sec, or no resting tone) → STOP INFUSION - **Fetal distress** (from hyperstimulation) → STOP INFUSION + resuscitation bundle - **Water intoxication** (hyponatremia) with prolonged high-dose infusion - **Maternal hypotension** (especially with bolus) **2. ANALGESIA AND ANESTHESIA** *Epidural Analgesia (Most Common Method):* - Administered into the epidural space (lumbar region) via a catheter; allows the woman to remain awake and cooperative - Provides excellent pain relief from the waist down; does NOT affect the baby directly - **Main complication: Maternal HYPOTENSION** (epidural blocks sympathetic vasoconstriction → vasodilation → BP drop → reduced placental perfusion → fetal distress) - **Prevention:** Pre-load with an IV fluid bolus (500–1000 mL LR) BEFORE epidural placement - **Treatment if hypotension occurs:** Reposition to LEFT LATERAL, increase IV fluids, administer oxygen, give **ephedrine** (vasopressor) if ordered - Also watch for: urinary retention, motor blockade (patient cannot feel/move legs — fall risk!), headache (if dural puncture occurs) *Opioid Analgesia (Systemic):* - Examples: **Nalbuphine (Nubain), Meperidine (Demerol), Morphine, Fentanyl** - Given IM or IV; reduces pain but does not eliminate it - **Critical Safety Rule: DO NOT give close to delivery** — if given within 1–4 hours of birth, neonatal respiratory depression can occur (the neonate cannot metabolize opioids efficiently) - **Antidote for neonatal respiratory depression: NALOXONE (Narcan)** — must always be available in the delivery room when opioids have been given to the mother *Pudendal/Local Block:* - Injected into the pudendal nerve or perineum - Provides localized perineal anesthesia for episiotomy repair, outlet forceps delivery, or vacuum extraction - Minimal systemic effects *Non-Pharmacologic Pain Management (Lamaze/Bradley/TENS):* - **Breathing techniques** (Lamaze) — slow paced breathing in early labor; patterned breathing in active labor; panting/blowing in transition - **Counter-pressure** — firm pressure on the sacrum during back labor (OP position) - **Hydrotherapy** — warm bath/shower in the latent phase - **Ambulation** and **position changes** - **Continuous support** (partner, doula, nurse) — shown to decrease labor duration, analgesia use, and cesarean rate

Unang Yakap (EINC) Protocol and Immediate Newborn Care

**Unang Yakap**, which means 'First Embrace' in Filipino, is the Department of Health (DOH) Essential Intrapartum and Newborn Care (EINC) protocol. It is mandated in all birthing facilities in the Philippines and represents evidence-based, safe, and humanized newborn care. The protocol was developed to reduce newborn mortality and improve breastfeeding outcomes. It is HEAVILY TESTED in the NLE because it is a nationally mandated Philippine healthcare policy. **The Four Time-Bound Core Steps of Unang Yakap:** **STEP 1: IMMEDIATE AND THOROUGH DRYING** - Timing: Within the FIRST 30 SECONDS of birth - Why: Prevents hypothermia (newborns lose heat rapidly through evaporation) and stimulates breathing - How: Dry the baby briskly with a clean, warm cloth from head to body; pay attention to the face, head, and extremities - Do NOT bathe the baby immediately — the vernix caseosa (white coating) provides thermal insulation and antimicrobial protection - If no spontaneous breathing after drying, stimulate by rubbing the back - Note: EINC recommends AVOIDING routine suctioning unless the airway is clearly obstructed (suction only when indicated) **STEP 2: EARLY SKIN-TO-SKIN CONTACT** - Timing: Immediately after drying (within the first minute) - Why: Regulates body temperature (kangaroo care), stabilizes blood glucose, promotes bonding, colonizes baby with maternal flora (protective microbiome), and stimulates early breastfeeding - How: Place the DRIED baby PRONE (face up) on the mother's bare chest/abdomen; cover both with a warm blanket; keep together for at least 90 minutes (or until after the first breastfeed) - Apply ID bracelet during skin-to-skin contact (do not separate for routine procedures) **STEP 3: PROPERLY TIMED CORD CLAMPING** - Timing: Clamp and cut the cord AFTER CORD PULSATIONS STOP (approximately 1–3 minutes after birth) - Why: Delayed cord clamping allows an additional 80–100 mL of blood (placental transfusion) to flow from the placenta to the neonate, improving iron stores, hematocrit, and reducing anemia risk - EINC AVOIDS early cord clamping (<1 minute), which was previously routine - Method: Double-clamp at 2 cm and 5 cm from the umbilicus; cut between clamps with sterile scissors - Inspect for 3 vessels in cord (2 arteries + 1 vein); only 1 artery = associated with renal abnormalities **STEP 4: NON-SEPARATION OF MOTHER AND BABY / EARLY BREASTFEEDING INITIATION** - Timing: First breastfeed within the FIRST HOUR of birth (the 'Golden Hour') - Why: Colostrum is the 'first milk' — rich in antibodies (IgA), nutrients, and growth factors; it is the baby's first vaccine and protects against infection - The breastfeeding crawl: When placed skin-to-skin, a neurologically intact newborn will spontaneously root, crawl toward the breast, and self-latch within 20–60 minutes — this is the 'breast crawl' - EINC prohibits routine separation for weighing, bathing, eye drops, and vitamin K until after the first breastfeed (unless medically indicated) - The nurse's role: Facilitate, observe, and support the first latch; do NOT force the baby to the breast **Other EINC Provisions (What EINC AVOIDS):** - Routine suctioning (unnecessary; clears the airway by crying) - Early bathing (<6 hours) - Routine formula supplementation - Mother-baby separation for routine newborn care **Apgar Scoring (done simultaneously during Unang Yakap):** - Assigned at 1 minute and 5 minutes (and 10 minutes if still low) - Five criteria: **Heart Rate, Respiratory Effort, Muscle Tone, Reflex Irritability (HEENT grimace), Color** (APGAR mnemonic) - Score 0–2 each; total 0–10 - 7–10 = Good condition; 4–6 = Moderate depression (stimulation needed); 0–3 = Severe depression (resuscitation needed)

This is an active phase scenario. The expected cervical dilation rate in multigravidas is ≥1.2–1.5 cm/hour. Serial examinations will confirm adequate progress. Contractions q4 min × 50 seconds are within the normal active phase range. Priority actions are monitoring, comfort, and safety. Multigravidas progress faster — anticipate progression to transition phase and delivery.

Late decelerations are ALWAYS ominous regardless of depth. They indicate that the placenta cannot deliver sufficient oxygen during uterine contractions. The presence of moderate variability is somewhat reassuring (fetal reserve is still present), but late decelerations ALWAYS require the resuscitation bundle and physician notification. Never delay stopping oxytocin for late decelerations.

A boggy uterus + displacement to the right + heavy lochia = uterine atony + full bladder. The FIRST nursing action is FUNDAL MASSAGE. The SECOND is having the patient void (or catheterizing) to relieve bladder distension. In the NLE, the sequence matters: massage FIRST, then void. Calling the physician is important but comes after initiating these independent nursing actions.

This is a classic NLE recall topic. Schultze vs. Duncan is frequently tested as a 'which is normal?' or 'which is more common?' type of question. Both are normal mechanisms. Schultze is more common (~80%). Duncan has more visible blood loss at delivery but the total blood loss is similar. Retained placental fragments (incomplete delivery) is a complication in both — always inspect the placenta.

This tests Leopold's manoeuvre interpretation combined with position identification. The denominators: Vertex = Occiput; Breech = Sacrum; Face = Mentum (chin); Brow = Frontum. A breech presentation at 38 weeks requires physician notification for delivery planning. The nursing role is accurate assessment and documentation.