## **Core Concept**
Stillbirth, also known as fetal demise or intrauterine fetal death, is defined by the World Health Organization (WHO) and other international standards based on fetal weight, gestational age, or a combination of both. The definition helps in establishing uniformity in reporting and managing fetal deaths globally.

## **Why the Correct Answer is Right**
The correct answer, **1000 grams**, corresponds with the international definition of stillbirth or fetal death. According to the World Health Organization (WHO), a stillbirth is defined as a baby born with no signs of life at or after 28 weeks of gestation, or with a birth weight of 1000 grams or more. This definition helps differentiate stillbirths from early neonatal deaths and miscarriages, facilitating accurate record-keeping and perinatal mortality rates.

## **Why Each Wrong Option is Incorrect**
- **Option A:** 500 grams. This is too low and does not align with the standard definition of stillbirth. While some definitions might consider viability at around 500 grams, it's not the threshold for stillbirth.
- **Option B:** 750 grams. This is below the commonly accepted threshold for stillbirth and does not align with international standards.
- **Option D:** 1500 grams. Although a significant birth weight, it is above the threshold commonly used to define stillbirth.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the definition of stillbirth can slightly vary by country or organization, but **1000 grams** or more, or a gestational age of 28 weeks or more, are commonly used thresholds. Understanding these definitions is crucial for accurate reporting of perinatal mortality.

## **Correct Answer:** C. 1000 grams.