Inlet Diameters: no Know Obstetic conjugate and diagonal conjugate
Pelvic outlet
Has two Triangular planes - ant triangle and post triangle
Pelvic Outlet: Inferior opening defined by ischial tuberosities, etc. (this is the bony feature you
sit on). The size of this outlet is important for a successful birth.
Obstetric conjugate - answer✔11cm
Mid sacral promontory to posterior superior margin of pubic symphysis
Imp AP Diameter b/c fetus mast pass though this one
Diagonal conjugate - answer✔12. 5cm
Subpubic angle to middle of sacral promontory
Can be measured
**Imp clinically sig b/c subtracting 1.5 cm approximates length of Obstetric conjugate
symphysis pubis - answer✔a cartilaginous joint that is the point of fusion for two pubic bones
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