Question

"What is the narrowest part of pelvic inlet vs pelvic outlet?

A) Pelvic inlet: Ischial spines, Pelvic outlet: Pubic symphysis
B) Pelvic inlet: Pubic symphysis, Pelvic outlet: Sacral promontory
C) Pelvic inlet: Sacral promontory, Pelvic outlet: Ischial spines
D) Pelvic inlet: Ischial tuberosities, Pelvic outlet: Pubic symphysis"

Answer 1

The narrowest part of the pelvic inlet is the sacral promontory, while the narrowest part of the pelvic outlet is defined by the ischial spines.

Step-by-step explanation:

The narrowest part of the pelvic inlet is the sacral promontory, and the narrowest part of the pelvic outlet is demarcated by the ischial spines. Therefore, the correct answer to the question is C) Pelvic inlet: Sacral promontory, Pelvic outlet: Ischial spines. The pelvic brim or inlet is marked by the superior margin of the pubic symphysis, pectineal line of the pubis, arcuate line of the ilium, and sacral promontory. The pelvic outlet is shaped by the inferior margin of the pubic symphysis, ischiopubic rami, sacrotuberous ligaments, and the tip of the coccyx. It is important to note that the female pelvis is generally wider with a larger pelvic outlet to facilitate childbirth.