A gynecologist noted that fetal head is difficult to push down into the pelvis on 36th week of check-up. Antenatal USG done shows presence of:
**Core Concept**
The question tests the understanding of a condition that affects fetal head engagement in the pelvis during late pregnancy. The underlying principle is the relationship between fetal head shape and the pelvic inlet, which can be influenced by various factors.
**Why the Correct Answer is Right**
The correct answer is likely related to the shape of the fetal head. In a normal pregnancy, the fetal head assumes a moldable shape to facilitate its passage through the birth canal. However, certain conditions can alter the shape of the fetal head, making it more difficult to engage in the pelvis. One such condition is **molded head**, which occurs when the fetal head is compressed against the maternal pelvis, resulting in a flattened shape. This can be due to a variety of factors, including a narrow pelvic inlet or a large fetal head.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not a condition that affects fetal head engagement in the pelvis.
**Option B:** This option is not a factor that contributes to a molded head.
**Option C:** This option is not a correct description of the condition.
**Clinical Pearl / High-Yield Fact**
A molded head can be a sign of cephalopelvic disproportion (CPD), which occurs when the fetal head is too large to pass through the maternal pelvis. This can lead to complications during delivery, including the need for cesarean section.
**Correct Answer: C.**