What is the cause of excessive per vaginal bleeding during the first trimester?

Appeared in: NHM MP Staff Nurse-2019

Explanation

Both incomplete abortion and vesicular mole are significant causes of excessive vaginal bleeding in early pregnancy.
Incomplete abortion involves retained products of conception that prevent the uterus from contracting properly, leading to heavy bleeding and cramping.
A vesicular mole (hydatidiform mole) is an abnormal pregnancy characterized by proliferative trophoblastic tissue that is highly vascular and prone to causing significant hemorrhage.
Since both are valid causes, the option that includes both is the most comprehensive and correct answer.

Option A: This option is partially correct but incomplete. While incomplete abortion is a major cause of first-trimester bleeding, it is not the only cause listed among the options.
Option B: This option is also partially correct but incomplete. Vesicular mole can cause excessive bleeding, but so can an incomplete abortion.
Option C: This option is incorrect because both options A and B are well-established and common causes of excessive vaginal bleeding in the first trimester.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Etiology of first-trimester vaginal bleeding as background academic context rather than a clinical decision trigger.
Any first-trimester bleeding requires prompt evaluation to rule out life-threatening conditions like ectopic pregnancy and to manage potential hemorrhage and shock.
Nursing priorities include assessing for hemodynamic instability (tachycardia, hypotension), establishing large-bore IV access for fluid or blood replacement, and quantifying blood loss.
It is critical to determine the patient's Rh status and administer Rho(D) immune globulin to Rh-negative women after any bleeding event in pregnancy to prevent future hemolytic disease of the newborn.

How to Approach the Question

First, analyze the question, which asks for the cause(s) of 'excessive' vaginal bleeding in the first trimester.
Evaluate each clinical condition presented in the options. Ask yourself: 'Can incomplete abortion cause excessive bleeding?' The answer is yes.
Next, ask: 'Can a vesicular mole cause excessive bleeding?' The answer is yes.
Since both options A and B are correct, look for a composite option that includes both.
Option D, 'Both a and b,' correctly identifies that both conditions are valid causes, making it the most complete and accurate answer.
This question tests your knowledge of the differential diagnoses for a common and serious obstetrical complaint.

Concept Tested & Keywords

QlhAfs0Zqg-N3zlYFPYuLM

E6 Gynecology Williams pp. 152-180, 148-179

E6 Obstetrics Williams p. 48-68

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