The type of pelvis ik which the features are heart shaped brim, narrow forepelvis and sciatic notch with prominent ischila spines and suprapubic angle< 90°:-
A. Gynecoid pelvis
B. Android pelvis
C. Anthropoid provis
D. Platypelloid pelvis
Correct Answer: B. Android pelvis
Explanation
The pelvis with the features you mentioned—
- Heart-shaped pelvic brim
- Narrow forepelvis
- Prominent ischial spines
- Narrow sciatic notch
- Subpubic (suprapubic) angle < 90°
—corresponds to the Android pelvis.
Explanation:
The Android pelvis is the male-type pelvis. Its characteristic features include:
- Pelvic inlet: Heart-shaped
- Forepelvis: Narrow
- Ischial spines: Prominent and projecting inward
- Greater sciatic notch: Narrow
- Subpubic angle: Acute (< 90°)
🔹 This type of pelvis is unfavourable for normal vaginal delivery because the narrow mid-pelvis may cause obstructed labour.
✅ Correct answer: Android pelvis
Other Options Details
Here is a clear, exam-oriented description of all four types of pelvis commonly asked in obstetrics and nursing exams:
A. Gynecoid pelvis
- Most common and ideal female pelvis
- Typical of adult females
- Pelvic inlet: Round or slightly oval
- Pelvic cavity: Spacious, well-curved
- Ischial spines: Blunt and not prominent
- Subpubic angle: Wide (>90°)
- Obstetric significance:
✔️ Most favorable for normal vaginal delivery
B. Android pelvis
- Male-type pelvis
- Found in some females
- Pelvic inlet: Heart-shaped or triangular
- Pelvic cavity: Narrow, funnel-shaped
- Ischial spines: Prominent
- Subpubic angle: Narrow
- Obstetric significance:
❌ Unfavorable for vaginal delivery
→ May cause deep transverse arrest and prolonged labor
C. Anthropoid pelvis
- Ape-type pelvis
- Pelvic inlet: Oval, elongated anteroposteriorly
- Pelvic cavity: Deep and narrow
- Ischial spines: Usually not prominent
- Subpubic angle: Moderate
- Obstetric significance:
✔️ Vaginal delivery possible
⚠️ Occipito-posterior position is common
D. Platypelloid pelvis
- Flat pelvis
- Least common type
- Pelvic inlet: Kidney-shaped or transversely oval
- Pelvic cavity: Shallow
- Anteroposterior diameter: Reduced
- Subpubic angle: Wide
- Obstetric significance:
❌ Difficult engagement of fetal head
→ Often leads to obstructed labor
Quick comparison table (for revision)
Pelvis Type Inlet Shape Delivery Outcome Gynecoid Round Best for delivery Android Heart-shaped Poor Anthropoid Oval (AP long) Fair Platypelloid Flat Poor
If you want, I can also:
- Give MCQs with answers
- Explain which pelvis is most common
- Provide easy memory tricks
- Explain pelvic inlet shapes diagrammatically
I hope that you liked this article.
Thanks!! 🙏 😊
Writer: Vandita Singh, Lucknow (GS India Nursing Group