A 28-year-old primigravida at term is in active labor. After 2 hours of second stage, she has not progressed despite adequate contractions. Fetal heart rate is reassuring. The head is at +2 station in the left occipitoanterior (LOA) position. You decide to perform an instrumental delivery. What is the most common indication for forceps delivery in modern obstetric practice?

Explanation

## Most Common Indication for Forceps Delivery **High-Yield:** Prolonged second stage of labor is the single most common indication for operative vaginal delivery (forceps or vacuum) in contemporary obstetrics, accounting for approximately 50–60% of all instrumental deliveries. ### Definition of Prolonged Second Stage According to ACOG and modern guidelines: - **Nulliparous women:** > 3 hours with epidural, > 2 hours without epidural - **Multiparous women:** > 2 hours with epidural, > 1 hour without epidural ### Why Prolonged Second Stage Is Most Common 1. **Epidural anesthesia prevalence** — widespread use of neuraxial analgesia delays second stage descent and increases need for assistance 2. **Active management philosophy** — modern obstetrics favors expedited delivery once second stage limits are exceeded, rather than prolonged expectant management 3. **Maternal and fetal safety** — prolonged pushing increases maternal exhaustion, perineal trauma, and fetal acidosis risk ### Comparison of Indications | Indication | Frequency | Mechanism | |---|---|---| | **Prolonged second stage** | Most common (50–60%) | Arrest of descent, maternal exhaustion | | Fetal distress | 20–30% | Abnormal FHR pattern requiring expedited delivery | | Maternal exhaustion | Included in prolonged stage | Often overlaps with prolonged second stage | | CPD with arrest | Rare (5–10%) | Contraindication if true CPD; forceps only if descent possible | **Key Point:** Forceps are indicated when descent has occurred but progress stalls—not for primary arrest of descent at high stations (which suggests CPD). **Clinical Pearl:** Modern vacuum extraction has partially replaced forceps for prolonged second stage, but forceps remain the gold standard for rotation and traction when the head is low and well-applied. **Tip:** On NEET PG, remember that **prolonged second stage** is the most frequently tested indication because it is the most common real-world scenario.