A conceptus material is brought by the police. It is 2 cm in length and 10 g in weight. Probable age is: AIIMS 12
**Core Concept**
The conceptus material in question refers to a product of conception, which can be either a fetus or an embryo at different stages of development. Determining the age of the conceptus is crucial in forensic medicine for estimating the gestational age and identifying potential perpetrators of crimes related to fetal development.
**Why the Correct Answer is Right**
The given dimensions of the conceptus material, 2 cm in length and 10 g in weight, are indicative of an early gestational age. At 2 cm in length, the conceptus is likely in the embryonic stage, and its weight of 10 g corresponds to a gestational age of approximately 8-10 weeks. This estimate is based on the average growth rate of the embryo during the first trimester.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as the dimensions provided are not consistent with a conceptus at 4-6 weeks gestation, which would be significantly smaller in size and weight.
**Option B:** This option is incorrect as the conceptus at 12-14 weeks gestation would be larger in size and weight, typically exceeding 3 cm in length and 20-30 g in weight.
**Option C:** This option is incorrect as the conceptus at 16-18 weeks gestation would be even larger in size and weight, typically exceeding 10 cm in length and 50-60 g in weight.
**Clinical Pearl / High-Yield Fact**
When estimating the gestational age of a conceptus, it is essential to consider the average growth rates and corresponding weights at different stages of development. This knowledge is crucial in forensic medicine for accurate age estimation and potential identification of perpetrators.
**Correct Answer: C. 16-18 weeks.**