**Core Concept**
Palmer's sign is a clinical finding used to detect pregnancy, particularly in the early stages. It is a palpable, soft, and slightly tender mass in the uterine region, which is a result of the enlarging uterus.

**Why the Correct Answer is Right**
The Palmer's sign is a clinical indication of early pregnancy, which is caused by the enlargement of the uterus due to the implantation of the fertilized ovum. The uterine enlargement leads to a palpable mass in the lower abdomen, which is typically soft and slightly tender. This sign is most commonly detected between 8-12 weeks of gestation, when the uterus is still small enough to be palpable. The uterus expands to accommodate the growing embryo, causing the surrounding tissues to become stretched and tender.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe Palmer's sign.
* **Option B:** This option is incorrect because it refers to a different clinical finding.
* **Option D:** This option is incorrect because it is not related to the detection of early pregnancy.

**Clinical Pearl / High-Yield Fact**
Palmer's sign is an important clinical finding that can be used to confirm early pregnancy. It is essential to differentiate it from other palpable masses in the uterine region, such as ovarian cysts or fibroids.

**Correct Answer:** C.