Chadwick's sign is a probable sign of pregnancy characterized by a distinctive color change in which anatomic… - BTSC Staff Nurse 1 August-2025

BTSC Staff Nurse 1 August-2025

Obstetrics & Gynaecology

Easy

Appeared in: BTSC Staff Nurse 1 August-2025

Explanation

Chadwick's sign is a classic probable sign of pregnancy, meaning it is a strong indicator but not definitive proof.
It is characterized by a bluish-purple discoloration of the cervix, vagina, and labia.
The color change is caused by hyperemia, which is an increase in blood flow to the pelvic organs stimulated by pregnancy hormones.
This sign can be observed by an examiner during a pelvic exam as early as 6 to 8 weeks of gestation.

Option A: Color changes in the fingernails and fingertips are not a recognized sign of pregnancy. While some women report changes in nail growth or texture, a specific color change like the one in Chadwick's sign does not occur here.
Option B: The nipples and areola undergo hyperpigmentation (darkening) and may develop Montgomery's tubercles. This is a separate presumptive/probable sign of pregnancy caused by hormonal changes, but it is not the bluish discoloration known as Chadwick's sign.
Option C: This describes the linea nigra, a dark vertical line that often appears on the abdomen during pregnancy. It is a form of hyperpigmentation, not the vascular congestion seen in Chadwick's sign.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Probable signs of pregnancy as background academic context rather than a clinical decision trigger.
Nurses must accurately differentiate between presumptive, probable, and positive signs of pregnancy to provide correct patient counseling and manage expectations. Probable signs like Chadwick's are strong indicators but require confirmation with positive signs (e.g., ultrasound) to definitively diagnose pregnancy.
Observing Chadwick's sign during a pelvic exam prompts the nurse to consider pregnancy and initiate appropriate follow-up, such as a pregnancy test and counseling on prenatal care.
What if? If a non-pregnant woman presents with a bluish cervix, it could indicate pelvic congestion from other causes, such as a pelvic mass or vascular abnormality. The nurse should document this finding and ensure the patient is referred for further gynecological evaluation.

How to Approach the Question

This is a factual recall question testing your knowledge of the signs of pregnancy.
First, identify the key term in the question: "Chadwick's sign".
Recall the definition of Chadwick's sign, focusing on the specific physiological change (color) and the anatomical location.
Evaluate the given options to find the one that correctly identifies the location of this bluish/purplish discoloration.
Eliminate the incorrect options by associating them with other, different signs of pregnancy (like linea nigra and areolar changes) or recognizing they are not related to pregnancy.

Concept Tested & Keywords

Concept Tested: Probable signs of pregnancy
Stem keywords: Chadwick's sign, probable sign, pregnancy, color change, anatomical area
Lead-in keywords: which
Negative lead-in flag: false

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E6 Obstetrics Williams pp. 39-58, 40-59