Shape of Gynecoid of female provis brim is:
A. Round
B. Oval
C. Flat
D. Heart
Correct Answer: A. Round
Explanation
The gynecoid pelvis is considered the classic female pelvis, most favorable for childbirth. Let’s break down the question carefully:
Question: “Shape of Gynecoid of female pelvic brim?”
- The pelvic brim (or inlet) is the upper opening of the true pelvis, through which the fetal head enters during labor.
- In a gynecoid pelvis, the pelvic brim is:
- Shape:Round or slightly oval
- The transverse diameter is slightly greater than the anteroposterior (AP) diameter, giving a round/oval shape.
- This shape provides the maximum space for fetal passage.
- Other features of gynecoid pelvis:
- Wide subpubic arch
- Straight side walls
- Sacrum is short, wide, and evenly curved
- Promontory is not prominent
✅ Summary: The shape of the pelvic brim in a gynecoid pelvis is round or slightly oval, which is ideal for vaginal delivery.
Other Options Details
These shapes refer to the shape of the pelvic inlet, which is important in obstetrics because it affects the mechanism of labour.
A. Round
- Typical of: Gynecoid pelvis
- Description:
- Pelvic inlet is almost circular
- Anteroposterior and transverse diameters are nearly equal
- Obstetric significance:
- Most favorable for normal vaginal delivery
- Allows easy engagement and descent of the fetal head
B. Oval
- Typical of: Anthropoid pelvis
- Description:
- Pelvic inlet is oval, with anteroposterior diameter longer than transverse
- Obstetric significance:
- Vaginal delivery is usually possible
- Occipito-posterior position of the fetal head is common
C. Flat
- Typical of: Platypelloid pelvis
- Description:
- Pelvic inlet is flattened from front to back
- Transverse diameter is wide, anteroposterior diameter is short
- Obstetric significance:
- Engagement of the fetal head is difficult
- Labour may be prolonged or obstructed
D. Heart-shaped
- Typical of: Android pelvis
- Description:
- Pelvic inlet is heart-shaped due to a prominent sacral promontory
- Narrow anterior segment
- Obstetric significance:
- Least favorable for vaginal delivery
- Higher risk of deep transverse arrest and operative delivery
Summary Table
Shape Pelvis Type Labour Outcome Round Gynecoid Best for normal labour Oval Anthropoid Usually favorable Flat Platypelloid Difficult engagement Heart Android Poor obstetric outcome
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Writer: Vandita Singh, Lucknow (GS India Nursing Group