**Question:** A woman with a previous Lower segment cesarean section will require an elective repeat cesarean section in all of the following conditions, EXCEPT ?

A. Preterm labor
B. Intrauterine growth restriction (IUGR)
C. Placenta previa
D. Placenta abruption

**Correct Answer:** C. Placenta previa

**Core Concept:** Planned cesarean section, also known as elective repeat cesarean section, is a surgical procedure for delivery of a fetus when the previous uterine scar is known. It is performed in situations where the risk of complications associated with vaginal delivery outweigh the benefits.

**Why the Correct Answer is Right:** In the case of a woman with a previous lower segment cesarean section, an elective repeat cesarean section is typically recommended for conditions that pose significant risks to the mother or fetus during vaginal delivery. These risks include:

1. Preterm labor: If labor occurs before 37 completed weeks of gestation (preterm labor), an elective repeat cesarean section is required to ensure optimal fetal and maternal outcomes.
2. Intrauterine growth restriction (IUGR): In cases of IUGR, the decision for an elective repeat cesarean section is based on the potential complications associated with IUGR, such as fetal distress during labor, which may necessitate an emergency cesarean section.
3. Placenta previa: Placenta previa is a condition where the placenta is partially or completely covering the cervix. In this case, an elective repeat cesarean section is recommended to avoid the risks associated with attempting vaginal delivery, such as heavy bleeding due to placental abruption, maternal hypovolemic shock, or maternal death.
4. Placenta abruption: Placenta abruption is a life-threatening obstetric emergency characterized by placental detachment from the uterine wall, leading to severe hemorrhage and maternal and fetal complications. In this context, an elective repeat cesarean section is crucial to prevent placenta abruption and its severe consequences.

**Why Each Wrong Option is Incorrect:**

1. Preterm labor: Although preterm labor is a reason for an elective repeat cesarean section, the correct answer is not "Placenta previa" since preterm labor is a separate indication for elective cesarean section and does not directly contrast with placenta previa.

2. IUGR: While IUGR is a reason for elective repeat cesarean section due to potential complications during labor, the correct answer is not "Placenta previa" since preterm labor and IUGR are separate indications for elective cesarean section and do not contrast with placenta previa.

3. Placenta abruption: Placenta abruption is a life-threatening obstetric emergency, not a reason for elective cesarean section. Placenta previa is the correct answer as it is a condition that requires elective cesarean section due to the risk of severe bleeding and complications.

**Clinical Pearl:**

Placenta previa