**Core Concept**
Maternal Mortality Rate (MMR) is a critical indicator of the quality of healthcare services for pregnant women. It is defined as the number of deaths due to pregnancy-related complications per 100,000 live births. The World Health Organization (WHO) uses MMR as a key performance indicator to evaluate the effectiveness of maternal healthcare systems.

**Why the Correct Answer is Right**
The correct answer will be the statement that does not accurately describe MMR. MMR is a sensitive indicator of the healthcare system's ability to prevent and manage pregnancy-related complications. Factors contributing to high MMR include inadequate access to prenatal care, poor quality of care during childbirth, and a lack of emergency obstetric care. In contrast, low MMR is often associated with well-developed healthcare systems, high levels of education among women, and effective implementation of evidence-based maternal healthcare practices.

**Why Each Wrong Option is Incorrect**
**Option A:** This statement might be true or false depending on the context, but it is not a definitive characteristic of MMR.
**Option B:** This statement is incorrect because MMR is indeed used as a key indicator of maternal healthcare quality and access.
**Option C:** This statement might be true, but it is not a defining characteristic of MMR.

**Clinical Pearl / High-Yield Fact**
It is essential to note that MMR is a lagging indicator, meaning that it takes time to reflect changes in healthcare policies and practices. Therefore, MMR is often used as a benchmark to evaluate the effectiveness of maternal healthcare initiatives and to identify areas for improvement.

**Correct Answer: B.**