**Core Concept**
The internationally accepted definition of abortion refers to the premature expulsion of the products of conception, which includes the embryo or fetus, placenta, and other associated tissues. This definition is crucial in the context of medical and legal terminology.

**Why the Correct Answer is Right**
The correct answer is based on the World Health Organization's (WHO) definition of abortion, which emphasizes the premature expulsion of the products of conception. This definition is essential for accurate reporting, research, and clinical management of abortion-related complications. The premature expulsion of the products of conception can be spontaneous or induced, and it is a critical aspect of obstetric and gynecological care.

**Why Each Wrong Option is Incorrect**
**Option A:** The expulsion of the products of conception is not limited to the uterus; it can occur in other parts of the reproductive tract, such as the cervix or vagina.

**Option B:** The definition of abortion does not specify the duration of pregnancy or the method of expulsion.

**Option C:** The products of conception include the embryo or fetus, placenta, and other associated tissues, which are not limited to the fetus alone.

**Clinical Pearl / High-Yield Fact**
It is essential to differentiate between spontaneous abortion (miscarriage) and induced abortion, as their management and clinical implications differ significantly.

**Correct Answer: C. The products of conception include the embryo or fetus, placenta, and other associated tissues.**