According to Caldwell-Moloy classification, how many types of pelvis are there?

Appeared in: CIP Ranchi 2023

Explanation

The Caldwell-Moloy classification, established in the 1930s, is a fundamental concept in obstetrics used to categorize the female pelvis based on its shape.
This system identifies four distinct 'parent' types of pelvis, which are crucial for predicting the course of labor and the likelihood of a successful vaginal delivery.
The four primary types are Gynecoid, Android, Anthropoid, and Platypelloid.
While many individuals have mixed pelvic shapes, the classification is based on these four foundational categories.

Option A: This is incorrect. The Caldwell-Moloy classification identifies more than three types of pelvis.
Option C: This is incorrect. Although mixed pelvic types exist, the primary classification system is based on four parent shapes, not five.
Option D: This is incorrect. The Caldwell-Moloy system is strictly limited to four foundational pelvic shapes.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Caldwell-Moloy classification of pelvic types as background academic context rather than a clinical decision trigger.
Assessing the pelvic type helps nurses and obstetricians anticipate potential labor difficulties, such as dystocia, fetal malposition, or the need for operative delivery (forceps, vacuum, or cesarean section).
The Gynecoid pelvis is the most common type (around 50% of women) and is considered the most favorable for a straightforward vaginal birth.
An Android or Platypelloid pelvis can significantly increase the risk of labor complications, requiring closer monitoring and potential intervention.

How to Approach the Question

This is a factual recall question common in nursing and midwifery exams.
Identify the key term in the question: 'Caldwell-Moloy classification'.
Recall the specific details of this classification system, which is a cornerstone of obstetric anatomy.
The system categorizes the female pelvis into a specific number of primary shapes based on the pelvic inlet.
Remember that the classification defines four main types.
Select the option that matches this number (4).

Concept Tested & Keywords

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E6 Obstetrics Williams p. 16-33

E6 Midwifery Obstetrics and Gynecology Nursing Sandeep Kaur p. 50-59

Practise the full CIP Ranchi 2023

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