Aboion is defined as “expulsion of fetus” less than………………..gms :
**Core Concept**
The definition of abortion in medical terminology is crucial for understanding the distinction between spontaneous and induced termination of pregnancy. The threshold weight for fetal expulsion to be considered an abortion is based on the gestational age and fetal weight, which is essential for classifying pregnancy outcomes.
**Why the Correct Answer is Right**
The correct answer is based on the World Health Organization's (WHO) definition of abortion, which considers the expulsion of a fetus weighing less than 500 grams as an abortion. This definition is significant because it helps in differentiating between spontaneous and induced abortions. Spontaneous abortions, also known as miscarriages, occur when the fetus is expelled before reaching 20 weeks of gestation, whereas induced abortions are intentionally performed to terminate a pregnancy. The 500-gram threshold is used to distinguish between these two types of pregnancy outcomes.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because there is no widely accepted medical definition of abortion that corresponds to this weight threshold.
* **Option B:** This option is incorrect because it does not match the WHO's definition of abortion, which is based on the weight of the fetus.
* **Option C:** This option is incorrect because it is not a recognized threshold for distinguishing between spontaneous and induced abortions.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the definition of abortion is based on the gestational age and fetal weight, and the 500-gram threshold is a widely accepted standard in medical practice.
**Correct Answer: C. 500g**