## Core Concept
Vasa previa is a condition where fetal blood vessels, unsupported by either the umbilical cord or placental tissue, traverse the cervix below the presenting part of the fetus. This condition poses a significant risk of fetal hemorrhage and death if these vessels rupture during labor or membrane rupture.

## Why the Correct Answer is Right
The statement regarding vasa previa that is NOT true needs to be identified based on the typical characteristics and risks associated with vasa previa. Generally, vasa previa is associated with a high risk of fetal mortality if the vessels rupture, and it often requires careful management, including possible preterm delivery. A key aspect of vasa previa is the presence of fetal vessels in the membranes covering the internal cervical os.

## Why Each Wrong Option is Incorrect
Without the specific details of options A, B, C, and D, a general approach to evaluating each option in relation to vasa previa is necessary:
- **Option A:** If this option describes a known risk or characteristic of vasa previa, such as the presence of fetal vessels in the lower uterine segment or the risk of fetal hemorrhage, then it would be a true statement.
- **Option B:** Similarly, if this option accurately describes a management strategy or complication associated with vasa previa, it would not be the correct answer if it's a true statement.
- **Option C:** This option would be incorrect if it accurately reflects a consequence or association with vasa previa.
- **Option D:** Given that D is the correct answer, this implies D states something NOT true about vasa previa.

## Clinical Pearl / High-Yield Fact
A crucial point to remember is that vasa previa is diagnosed prenatally with ultrasound, specifically with the use of color Doppler, which can visualize the fetal vessels in the lower uterine segment. Early diagnosis is critical for planning delivery and potentially improving outcomes.

## Correct Answer: D.