**Core Concept**
The concept of uterine softening with lateral implantation refers to the changes in uterine texture and position during pregnancy, specifically the softening of the uterine muscles and the lateral displacement of the uterus due to the growing fetus.

**Why the Correct Answer is Right**
During early pregnancy, the uterus undergoes softening due to the increased blood flow and relaxation of uterine muscles. As the pregnancy advances, the growing fetus causes the uterus to be displaced laterally, resulting in a softer and more distensible uterine texture. This is a normal physiological change that occurs in response to the growing fetus.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the softening of the uterus with lateral implantation.
**Option B:** This option is incorrect because it is not a recognized term in obstetrics or gynecology.
**Option C:** This option is incorrect because it refers to a different obstetric condition.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the softening of the uterus with lateral implantation is a normal physiological change that occurs during pregnancy, and it's an important sign to look for in obstetric exams.

**Correct Answer:** C. Chadwick's sign