Labor and Delivery, The Four Stages
Understanding the four stages of labor is fundamental to maternity nursing success. Each stage has specific assessment findings, nursing interventions, and danger signs that appear frequently on exams.
Stage 1: Dilation and Effacement
Stage 1 begins with true labor contractions and ends at full cervical dilation (10 cm). This longest stage divides into three phases. The latent phase (0-6 cm) features mild contractions every 5-30 minutes. The active phase (6-8 cm) brings stronger contractions every 3-5 minutes. The transition phase (8-10 cm) involves intense contractions every 2-3 minutes and lasts the shortest time but feels most overwhelming.
Stage 2: Expulsion of the Baby
Stage 2 begins at full dilation and ends with baby delivery. This stage typically lasts 20 minutes to 2 hours depending on parity. You'll coach pushing efforts, monitor fetal heart rate with each contraction, and prepare for delivery.
Stage 3: Delivery of the Placenta
Stage 3 begins after baby delivery and ends when the placenta is delivered, usually within 30 minutes. Watch for signs of placental separation: a gush of blood, lengthening umbilical cord, and a globular uterine shape. You'll administer oxytocin (Pitocin) to promote uterine contraction and prevent hemorrhage.
Stage 4: Recovery and Stabilization
Stage 4 covers the first 1-2 hours after placental delivery. Your priority is monitoring for hemorrhage and maternal stabilization. Check fundal firmness, lochia amount, vital signs, and pain level every 15 minutes initially.
| Term | Meaning |
|---|---|
| Stage 1, Latent Phase | Cervix dilates 0-6 cm. Contractions mild to moderate, irregular, 5-30 minutes apart, lasting 30-40 seconds. Duration: varies widely (average 8-10 hours for nullipara). Nursing: encourage ambulation, oral fluids, relaxation. Pain is generally manageable. |
| Stage 1, Active Phase | Cervix dilates 6-8 cm. Contractions moderate to strong, every 3-5 minutes, lasting 40-60 seconds. Duration: approximately 3-6 hours. Nursing: continuous FHR monitoring, pain management (epidural often requested here), assess cervical change q1-2h. |
| Stage 1, Transition Phase | Cervix dilates 8-10 cm. Contractions intense, every 2-3 minutes, lasting 60-90 seconds. Shortest but most intense phase. Patient may feel overwhelmed, nauseous, irritable, and report rectal pressure. Nursing: coaching, encouragement, prepare for delivery. |
| Stage 2, Expulsion | Full dilation (10 cm) to delivery of infant. Duration: 20 min to 2 hours (nullipara), shorter for multipara. Nursing: coach pushing efforts (open glottis preferred), monitor FHR with each contraction, prepare for delivery. Crowning indicates imminent delivery. |
| Stage 3, Placental | Delivery of infant to delivery of placenta. Should occur within 30 minutes. Signs of placental separation: gush of blood, lengthening of umbilical cord, globular uterine shape. Nursing: administer oxytocin (Pitocin) as ordered to promote uterine contraction and prevent hemorrhage. Inspect placenta for completeness (missing cotyledons can cause hemorrhage). |
Fetal Heart Rate Monitoring
Fetal heart rate (FHR) monitoring is a core competency in maternity nursing. The normal baseline FHR is 110-160 bpm. You must identify reassuring patterns (moderate variability, accelerations) and non-reassuring patterns (late decelerations, absent variability) and know appropriate interventions.
Reassuring Patterns
Accelerations are transient FHR increases of 15+ bpm lasting 15+ seconds. These indicate fetal well-being and are always reassuring. A reactive non-stress test requires 2 accelerations in 20 minutes.
Early decelerations are gradual FHR decreases that mirror contractions. They result from head compression as the baby descends. Early decelerations are benign and need no intervention.
Non-Reassuring Patterns
Variable decelerations are abrupt FHR drops of 15+ bpm lasting 15 seconds to less than 2 minutes. Cord compression causes these patterns. Interventions include repositioning the mother and amnioinfusion for recurrent patterns.
Late decelerations are the most concerning pattern. The FHR gradually decreases beginning after the contraction peak. This indicates uteroplacental insufficiency (reduced oxygen to the fetus). Immediate interventions: reposition to left lateral, give oxygen by mask, increase IV fluids, stop oxytocin, notify the provider. This pattern may require emergency cesarean delivery.
| Term | Meaning |
|---|---|
| Accelerations | Transient increase of FHR ≥15 bpm above baseline lasting ≥15 seconds (≥10 bpm for ≥10 seconds if <32 weeks gestation). Reassuring sign of fetal well-being. Reactive NST requires 2 accelerations in 20 minutes. |
| Early Decelerations | Gradual decrease in FHR that mirrors contractions (onset, nadir, and recovery correspond to contraction timing). Caused by fetal head compression during descent. Benign, no intervention needed. Mnemonic: Early = hEad compression. |
| Variable Decelerations | Abrupt decrease in FHR ≥15 bpm lasting ≥15 seconds but <2 minutes. Variable in shape, timing, and depth. Caused by umbilical cord compression. Interventions: reposition mother, amnioinfusion if recurrent. Mnemonic: Variable = Cord compression. |
| Late Decelerations | Gradual decrease in FHR beginning after contraction peak, with nadir after contraction ends. Caused by uteroplacental insufficiency (reduced oxygen delivery). Always non-reassuring. Interventions: left lateral position, O2 by mask, IV fluid bolus, discontinue oxytocin, notify provider immediately. Mnemonic: Late = Placental insufficiency. |
Postpartum Assessment, BUBBLE-HE
The BUBBLE-HE framework is the standard postpartum assessment tool. This systematic approach ensures no critical finding is missed. Each letter represents one body system to assess.
Breasts, Uterus, and Bladder
Breasts: Check for engorgement, nipple integrity, and lactation status. Uterus: Perform fundal checks. The fundus should be firm, midline, at or below the umbilicus, descending approximately 1 cm per day. A boggy (soft) uterus indicates uterine atony, the number one cause of postpartum hemorrhage. Bladder: Assess for urinary retention. A distended bladder displaces the uterus upward and increases hemorrhage risk.
Bowel, Lochia, and Episiotomy
Bowel: Assess for return of normal function and hemorrhoid status. Lochia: Monitor vaginal discharge progression. Rubra (dark red) appears days 1-3. Serosa (pinkish-brown) appears days 4-10. Alba (yellowish-white) appears from day 10 onward. Foul-smelling lochia suggests infection. Episiotomy/incision: Use REEDA assessment: Redness, Edema, Ecchymosis, Discharge, Approximation.
Homan's Sign and Emotional Status
Homan's sign and lower extremities: Assess for signs of deep vein thrombosis (DVT), a major postpartum complication. Emotional status: Screen for postpartum blues, depression, and psychosis.
| Term | Meaning |
|---|---|
| Uterine Assessment (Fundal Check) | Immediately postpartum: fundus should be firm, midline, at the umbilicus. Descends ~1 fingerbreadth (1 cm) per day. Boggy (soft) uterus = uterine atony = #1 cause of postpartum hemorrhage. Intervention: fundal massage, oxytocin. |
| Lochia Progression | Lochia rubra: dark red, days 1-3. Lochia serosa: pinkish-brown, days 4-10. Lochia alba: yellowish-white, day 10 to 6 weeks. Foul-smelling lochia suggests infection. Return to rubra after serosa/alba suggests retained fragments or overexertion. |
| Postpartum Hemorrhage | Blood loss >500 mL (vaginal birth) or >1000 mL (cesarean). #1 cause: uterine atony (tone). Other causes: trauma (tears, lacerations), tissue (retained placenta), thrombin (coagulopathy), the 4 T's. Nursing: fundal massage, oxytocin, notify provider, establish large-bore IV. |
High-Risk Obstetric Conditions
You must recognize and manage several life-threatening obstetric complications. These appear frequently on the NCLEX and require immediate nursing intervention.
Preeclampsia and HELLP Syndrome
Preeclampsia is hypertension (BP ≥140/90) plus proteinuria (≥300 mg/24 hours) after 20 weeks gestation. It can progress to eclampsia (seizures) if untreated. Magnesium sulfate is the first-line treatment to prevent seizures. Monitor for magnesium toxicity by checking deep tendon reflexes, respiratory rate, and urine output. The antidote is calcium gluconate.
HELLP syndrome (Hemolysis, Elevated Liver enzymes, Low Platelets) is a severe variant of preeclampsia requiring immediate delivery. Lab findings show hemolytic anemia, elevated liver enzymes, and thrombocytopenia.
Placenta Previa and Placental Abruption
Placenta previa occurs when the placenta covers the cervical os. It presents with painless, bright red vaginal bleeding. Never perform a vaginal exam. The uterus is soft and non-tender with normal fetal heart tones.
Placental abruption is premature separation of a normally implanted placenta. It presents with painful, dark red bleeding and a rigid, board-like abdomen. Fetal distress is common. Abruption is an emergency requiring immediate delivery if severe. Risk factors include hypertension, trauma, and cocaine use.