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may result in abnormal development of the pelvic bones. Stunting (being much shorter
than average for age) due to malnutrition and/or infectious diseases can also result in a
narrow pelvis.

➢ True pelvis:

Lies below the level of pelvic inlet. It is the bony canal through which the fetus

passes during birth. The true pelvis consists of:1-Inlet or brim 2-Cvity 3-Outlet

➢ The pelvic inlet:
The pelvic inlet is formed by the pelvic brim, which you saw in ( Figure 3). The pelvic
brim is rounded, except where the sacral promontory and the ischial spines project into

it. The dimensions in centimeters (cm) of the pelvic inlet are shown in Figure 3 in both
directions (top to bottom; and transverse or side to side). When you look at Figure 3,
imagine that you are a fetus in the head-down position, looking down on the pelvis from
above, at the space you must squeeze through! It is just 13 cm wide (on average) and

12 cm from top to bottom.

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