Which of the following includes the classical triad of enlarged upper part of uterus, soft lower part of body and firm cervix ‘during early pregnancy?
**Core Concept**
The classical triad of signs in early pregnancy refers to the changes in the uterus and cervix that occur due to the expanding uterus. This phenomenon is a result of the relaxation of the lower uterine segment and the firming of the cervix, which are adaptations to accommodate the growing fetus.
**Why the Correct Answer is Right**
The correct answer is the Hegar's sign, which is characterized by the presence of an enlarged upper part of the uterus, a soft lower part of the body, and a firm cervix. This sign is named after the German gynecologist Karl Hegar, who first described it in 1871. The Hegar's sign is a clinical finding that is often used to diagnose early pregnancy. The relaxation of the lower uterine segment and the firming of the cervix occur due to the hormonal changes caused by the pregnancy hormone, relaxin. Relaxin is a hormone that is produced by the placenta and causes the relaxation of the pelvic ligaments and the softening of the cervix.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not applicable, as there is no commonly recognized sign by this name.
* **Option B:** Chadwick's sign refers to the bluish discoloration of the vagina and cervix due to increased blood flow, which is not related to the classical triad of signs.
* **Option C:** Goodell's sign refers to the softening of the cervix, which is a sign of early pregnancy, but it does not include the entire classical triad of signs.
* **Option D:** Not applicable, as there is no commonly recognized sign by this name.
**Clinical Pearl / High-Yield Fact**
The Hegar's sign is a critical clinical finding in early pregnancy, and it is often used in conjunction with other signs such as the Chadwick's sign and Goodell's sign to diagnose pregnancy.
**Correct Answer:** C.