The time period of pregnancy defined as the third trimester of pregnancy is?

Appeared in: UPRVUNL - 2021

Explanation

Pregnancy is divided into three trimesters, each with a specific duration and developmental milestones.
The third trimester is the final phase, spanning from approximately 28 weeks of gestation until delivery, which is typically around 40 weeks.
This stage is characterized by rapid fetal growth, maturation of vital organs like the lungs, and the fetus positioning itself for birth.
Maternal monitoring increases during this time for conditions like preeclampsia and to assess fetal well-being.

Option A: The 5-6 week period falls within the early first trimester, which is the initial stage of pregnancy characterized by organogenesis.
Option C: The period of 13-24 weeks is part of the second trimester. This stage is known for rapid fetal growth and when the mother usually starts feeling fetal movements (quickening).
Option D: The first 12 weeks define the first trimester of pregnancy, not the third. This is the foundational period of fetal development.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Definition and duration of pregnancy trimesters as background academic context rather than a clinical decision trigger.
Understanding the trimesters is fundamental for scheduling appropriate antenatal tests (e.g., Group B Streptococcus screening in the third trimester), monitoring for specific complications (e.g., preeclampsia in the late second and third trimesters), and providing timely patient education.
It helps nurses anticipate the patient's physical and emotional needs at different stages of pregnancy.
What if? If a patient presents with painless vaginal bleeding at 32 weeks (third trimester), the primary concern is placenta previa. In contrast, the same symptom at 10 weeks (first trimester) would more likely suggest a threatened abortion. The trimester dictates the differential diagnosis and management plan.

How to Approach the Question

This is a factual recall question that tests your knowledge of basic obstetrics.
First, identify the key term in the question: "third trimester".
Recall the standard division of a 40-week pregnancy into three parts.
The first trimester is from week 1 to the end of week 12.
The second trimester is from week 13 to the end of week 27.
The third trimester is from week 28 to delivery (around week 40).

Concept Tested & Keywords

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E6 Obstetrics Williams p. 72-94

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 6-11

Practise the full UPRVUNL - 2021

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