A pelvis characterized by an anteroposterior diameter of the inlet greater than the transverse diameter is classified as
A. GynecoidB. Android
C. Anthropoid
D. Platypelloid
The Answer
is. C.
By tradition,
pelves are classified as belonging to one of four major groups. The gynecoid
pelvis is the classic female pelvis with a posterior sagittal diameter of the
inlet only slightly shorter than the anterior sagittal diameter. In the android
pelvis, the posterior sagittal diameter at the inlet is much shorter than the
anterior sagittal diameter, limiting the use of the posterior space by the
fetal head. In the anthropoid pelvis, the anteroposterior (AP) diameter of the
inlet is greater than the transverse diameter, resulting in an oval with large
sacrosciatic notches and convergent side walls. Ischial spines are likely to be
prominent. The platypelloid pelvis is flattened with a short AP and wide
transverse diameter. Wide sacrosciatic notches are common. The pelves of most
women do not fall into a pure type and are blends of one or more of the above
types.