## Oxytocin Use in Labor Induction **Key Point:** Oxytocin is the first-line agent for labor induction when the cervix is favorable. However, it has specific contraindications, including a history of classical cesarean section or multiple prior cesarean deliveries. ### Oxytocin Dosing and Administration **High-Yield:** The standard oxytocin protocol follows a predictable escalation: - **Starting dose:** 0.5–1 mIU/min intravenously - **Increment:** Increase by 1–2 mIU/min every 30–40 minutes - **Maximum dose:** Typically 20–40 mIU/min (rarely exceeds 20 mIU/min in modern practice) - **Duration:** Continue throughout labor and for ≥30 minutes after delivery to prevent postpartum hemorrhage ### Contraindications to Oxytocin | Contraindication | Reason | |---|---| | Classical (vertical) uterine incision | High risk of uterine rupture | | Multiple prior cesarean sections (≥2) | Cumulative uterine scar burden; increased rupture risk | | Placenta previa or vasa previa | Risk of massive hemorrhage | | Transverse lie or oblique lie | Cannot achieve vaginal delivery | | Cord prolapse | Fetal compromise | | Active genital herpes simplex infection | Risk of neonatal transmission | | Fetal distress or non-reassuring fetal heart rate | May worsen fetal compromise | **Clinical Pearl:** A single prior low-transverse cesarean section is NOT a contraindication to oxytocin use. TOLAC (trial of labor after cesarean) with oxytocin is safe in this setting, with uterine rupture rates <1%. **Warning:** Do NOT confuse "one prior low-transverse cesarean" (safe for oxytocin) with "classical cesarean" or "multiple prior cesareans" (contraindications). ### Why Option 2 Is Incorrect Oxytocin CAN be safely used in women with a history of **one prior low-transverse cesarean section**. This is a standard indication for TOLAC with oxytocin support. The contraindication applies to: - Classical (vertical) incisions, OR - Two or more prior cesarean deliveries This is a high-yield distinction frequently tested in NEET PG.
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