A pregnant woman presents with regular, strong uterine contractions but no cervical changes. Which uterine modification is likely NOT fully established?

Appeared in: NCL (Northern Coalfields Limited)-NO

Explanation

During pregnancy, the uterus undergoes a massive increase in blood supply to support the fetus and placenta.
Uteroplacental blood flow increases from approximately 450 mL/min in the mid-trimester to nearly 500 to 750 mL/min by 36 weeks' gestation.
This increased vascularity is essential for delivering oxygen and nutrients to the fetus.
Therefore, 'Decreased vascularity' is a physiological change that does NOT occur; the opposite is true.

Option A: The question stem explicitly states the woman has 'regular, strong uterine contractions,' which confirms that uterine contractility has increased and is well-established.
Option B: The uterus must become significantly more elastic to stretch and accommodate the growing fetus, placenta, and amniotic fluid. This is a fundamental adaptation throughout pregnancy.
Option C: The presence of 'regular, strong' contractions implies that the myometrial cells are contracting in a coordinated manner. This synchrony is dependent on the formation of gap junctions between the cells.

Visual 1: Diagram - A comparison of the non-pregnant uterus and the term pregnant uterus, highlighting the dramatic increase in size, muscle mass, and vascular supply.
Visual 2: Illustration - A microscopic view of myometrial cells showing the formation of gap junctions that allow for synchronized contractions.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Physiological changes of the uterus during pregnancy as background academic context rather than a clinical decision trigger.
Understanding the normal physiological changes of the uterus is crucial for nurses to assess labor progress accurately.
When a patient has strong contractions without cervical change, it indicates a potential for dysfunctional labor, which may require interventions like augmentation or reassessment of the fetal position and pelvic adequacy.
Recognizing deviations from normal physiology, such as signs of poor uterine perfusion (which would be related to vascular issues), is critical for fetal well-being.

How to Approach the Question

First, identify the key elements of the question: a pregnant woman with strong, regular contractions but no cervical change.
Note the negative framing of the question, which asks what modification is 'NOT' fully established.
Evaluate each option based on the known physiological adaptations of the uterus during pregnancy and labor.
Option A (Increased contractility) is confirmed by the stem.
Option B (Increased elasticity) is a necessary change for uterine growth.
Option C (Formation of gap junctions) is necessary for the coordinated contractions described.

Concept Tested & Keywords

Concept Tested: Physiological changes of the uterus during pregnancy
Stem keywords: pregnant woman, uterine contractions, no cervical changes, uterine modification
Lead-in keywords: NOT
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.
Negative lead-in flag: Question is negatively framed

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Practise the full NCL (Northern Coalfields Limited)-NO

Attempt every question from this paper in a timed mock, then review the full solution for each one.