Final answer:
Persistent OT position during childbirth is associated with an android pelvis shape, which has a narrow subpubic angle and a heart-shaped cavity that can complicate delivery.
Step-by-step explanation:
The question you've asked pertains to the association between persistent Occiput Transverse (OT) position during childbirth and the shape of the pelvis. The OT position is when the baby's head is positioned with the occiput, the back part of the skull, transverse or sideways relative to the mother's pelvis during labor, which can complicate delivery. This persistent position is associated with the android pelvis shape.
Among the four types of pelvis shapes - gynecoid, android, anthropoid, and platypelloid - the android shape is characterized by a narrow pelvic inlet, prominent ischial spines, a narrow subpubic angle, and a heart-shaped pelvic cavity. This shape may restrict the fetal head from rotating and descending easily, which can result in persistent OT position. On the other hand, the gynecoid pelvis, which is the most common shape among females, has a wide subpubic angle, round pelvic inlet, and a broad pelvic cavity that is conducive to childbirth. The anthropoid pelvis is elongated and oval-shaped, while the platypelloid pelvis is flat and wide but with a narrow anterior-posterior diameter.