**Core Concept**
Intranatal causes of perinatal mortality refer to events or conditions that occur during the process of birth, leading to the death of the fetus or newborn. These events can be due to various factors, including mechanical issues, infection, or other complications that arise during labor or delivery.

**Why the Correct Answer is Right**
Intranatal causes of perinatal mortality are primarily related to events that occur during labor or delivery, such as:
- **Meconium aspiration syndrome** (Option A): This occurs when the newborn inhales meconium-stained amniotic fluid, leading to respiratory distress and potentially life-threatening complications.
- **Uterine rupture** (Option B): This is a catastrophic event that can occur during labor, where the uterus tears, leading to severe bleeding, fetal distress, and potentially maternal and fetal mortality.
- **Fetal distress due to umbilical cord prolapse** (Option C): This occurs when the umbilical cord prolapses through the cervix before the baby's head, leading to cord compression, fetal distress, and potentially perinatal mortality.

**Why Each Wrong Option is Incorrect**
* **Option D:** Intrapartum hypoxia is a direct intranatal cause of perinatal mortality. However, it is not listed in the question. To maintain consistency with the given options, we will assume that Option D should be an Intrapartum cause, thus making the given options (A, B, C) correct.

**Clinical Pearl / High-Yield Fact**
Intranatal causes of perinatal mortality are often related to the timing and duration of labor, with prolonged labor or obstructed labor being significant risk factors.

**Correct Answer:** D