Which type of pelvis is associated with increased incidence of ‘face to pubis’ delivery :
**Core Concept**
The type of pelvis associated with an increased incidence of 'face to pubis' delivery is a key concept in obstetrics, referring to the pelvis's shape and dimensions that may lead to difficulties during vaginal delivery. In a 'face to pubis' delivery, the fetal head is delivered with the face presenting towards the mother's pubic bone, indicating a potential issue with the pelvis's dimensions.
**Why the Correct Answer is Right**
A 'face to pubis' delivery is often associated with a **gynaecoid pelvis**, which has a rounded and spacious pelvic outlet. This type of pelvis has a larger transverse diameter, allowing the fetal head to pass through with the face presenting towards the pubic bone. The gynaecoid pelvis is considered the most common and 'ideal' type of pelvis for vaginal delivery.
**Why Each Wrong Option is Incorrect**
**Option A:** The **android pelvis** has a more masculine shape, with a narrower pelvic outlet and a less spacious transverse diameter. This type of pelvis is less likely to be associated with 'face to pubis' delivery.
**Option B:** The **anthropoid pelvis** has a longer anteroposterior diameter, which can lead to difficulties during delivery, but it is not typically associated with 'face to pubis' delivery.
**Option C:** The **platypelloid pelvis** has a flat and wide pelvic outlet, which can also lead to difficulties during delivery, but it is not typically associated with 'face to pubis' delivery.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the type of pelvis can significantly impact the likelihood of a 'face to pubis' delivery. A gynaecoid pelvis is generally considered the most favorable for vaginal delivery, while other types of pelvis may increase the risk of complications.
**Correct Answer:** C.