Haryana CHO -2023: Majority of fetal presentations will be:

Haryana CHO -2023

Obstetrics & Gynaecology

Easy

Appeared in: Haryana CHO -2023

Explanation

Vertex (or occiput) presentation is the most common fetal presentation, occurring in approximately 96-97% of all term deliveries.
This presentation occurs when the fetus is in a longitudinal lie, head down, with the head fully flexed so that the chin is touching the chest.
This position is the most favorable for vaginal delivery because it allows the smallest diameter of the fetal head (suboccipitobregmatic) to pass through the maternal pelvis.
The natural shape of the uterus encourages this presentation, as the bulkier lower body of the fetus fits best in the wider uterine fundus.

Option A: Breech presentation, where the buttocks or feet present first, is the most common type of malpresentation but only occurs in about 3-4% of term singleton pregnancies.
Option B: Brow presentation is a very rare malpresentation, occurring in only about 0.1-0.2% of births. The fetal head is partially extended, presenting a large diameter to the pelvis, which often leads to obstructed labor.
Option C: Face presentation is also a rare malpresentation, with an incidence of approximately 0.1%. The fetal head is hyperextended, causing the face to present first. While vaginal delivery is sometimes possible, it carries higher risks.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain This question tests the knowledge of fetal presentations and their relative incidence at term as background academic context rather than a clinical decision trigger.
Nurses use Leopold's maneuvers and vaginal examinations to assess fetal presentation and position during labor. Accurate assessment is critical for anticipating the progress of labor and potential complications.
Identifying a malpresentation (any presentation other than vertex) early allows the healthcare team to plan for appropriate interventions, such as an External Cephalic Version (ECV) for a breech fetus or a planned Cesarean section if vaginal delivery is not safe.
What if? If a breech presentation is identified at 37 weeks, the nurse should anticipate counseling the patient on her options. These typically include attempting an ECV to turn the fetus to a vertex presentation, planning a vaginal breech delivery if criteria are met and the provider is experienced, or scheduling a Cesarean delivery.

How to Approach the Question

This is a factual recall question that requires knowledge of basic obstetrics.
First, understand the question's keyword: "majority." This asks for the most common or frequent occurrence.
Next, recall the different types of fetal presentations: cephalic (which includes vertex, brow, and face) and breech.
Remember the normal physiological adaptation of the fetus to the uterine environment. The fetus typically positions its head down (cephalic) to fit the pear-like shape of the uterus.
Recall the approximate incidence rates. Vertex presentation is extremely common (over 95%), while breech, brow, and face are all considered malpresentations and are comparatively rare.
Based on this knowledge, select 'Vertex' as the only option that represents the vast majority of cases.

Concept Tested & Keywords

Concept Tested: This question tests the knowledge of fetal presentations and their relative incidence at term.
Stem keywords: fetal presentations, majority
Lead-in keywords: BEST, MOST RELEVANT CLUE