Which one of the following pairs regarding pelvis is NOT correct
A. Gynecoid: Female
B. Android: Male type
C. Anthropoid: Ape type
D. Platypelloid: Flat type
Correct Answer: C. Anthropoid: Ape type
Explanation
To answer “Which one of the following pairs regarding pelvis is NOT correct”, the options (pairs) are essential.
📌 Why?
This is an MCQ-type question. Without seeing the given pairs (e.g., pelvis type + inlet shape, diameter + definition, landmark + significance), it’s not possible to identify which one is incorrect.
How this question is usually approached
You check whether each pair matches standard obstetric anatomy, for example:
- Gynecoid pelvis → Round inlet ✅
- Android pelvis → Heart-shaped inlet ✅
- Anthropoid pelvis → Oval (AP diameter > transverse) ✅
- Platypelloid pelvis → Flat inlet (transverse > AP) ✅
Any mismatch among such pairs becomes the NOT correct answer.
👉 Please share the answer options (pairs), and I’ll:
- Identify the incorrect pair
- Explain why it is wrong
- Briefly revise the correct concept for exam clarity
Other Options Details
Here is a clear description of all four pelvic types, commonly asked in obstetrics and anatomy:
A. Gynecoid Pelvis (Female type)
- Most common and ideal pelvis for normal vaginal delivery
- Pelvic inlet is round or transversely oval
- Wide pelvic cavity
- Blunt ischial spines
- Sacrum is wide and well-curved
- Subpubic angle is wide (>90°)
- Fetal head engages easily
✅ Best suited for childbirth
B. Android Pelvis (Male type)
- Resembles the male pelvis
- Pelvic inlet is heart-shaped
- Narrow pelvic cavity
- Prominent ischial spines
- Sacrum is flat
- Subpubic angle is narrow (<90°)
- May cause deep transverse arrest ❌ Less favorable for vaginal delivery
C. Anthropoid Pelvis (Ape type)
- Pelvic inlet is oval with long anteroposterior diameter
- Pelvic cavity is deep
- Ischial spines are not prominent
- Sacrum is long
- Subpubic angle is moderately wide
- Occipito-posterior positions are common
✔ Vaginal delivery usually possible
D. Platypelloid Pelvis (Flat type)
- Pelvic inlet is transversely oval (flattened)
- Reduced anteroposterior diameter
- Shallow pelvic cavity
- Wide subpubic angle
- Fetal head engagement is difficult ❌ Least common and unfavorable for vaginal delivery
Summary Table
Pelvis Type Inlet Shape Delivery Outcome Gynecoid Round Best Android Heart-shaped Difficult Anthropoid AP oval Usually possible Platypelloid Flat Difficult
I hope that you liked this article.
Thanks!! 🙏 😊
Writer: Vandita Singh, Lucknow (GS India Nursing Group