Mention the characteristics of a typical female pelvis. Name the Structures passing through the brim of pelvis
Characteristics of a typical female pelvis: General characters: *The bones are lighter and muscular markings & ridges are less prominent * Iliac fossa is shallow *Lower borders of ischiopubic rami are not much everted due to weak attachments of crura clitoridis. *Acetabular cavity is small. *Obturator formamen is small and triangular. *Preauricular sulcus is prominent
In Pictures: Left one is Male Pelvis and Right Female Pelvis
Pelvic inlet: *Usually round in shape & all the diameters are longer than that of male.
Pelvic cavity: * Shorter and more cylindrical (wide & roomy). * Symphysis and pubic body are short. *Puboischial index is more than 90º. * Anterior segment of chilotic line is longer than the posterior segment.
Pelvic outlet: *Much larger * Subpubic angle is 80º-85º. *Ischiopubic rami are thinner and slightly everted. * Coccyx is more vertical
Greater sciatic notch is wider (about 74º).
Sacroiliac joint permits rotatory movement during pregnancy.