The female pelvis

The female pelvis is different from the male number of features: it wider and shallower. The angle formed by the descending branches of the pubic bone - straight or with a blunt, the distance between the sciatic mounds in the female pelvis more; acetabular more distant from one another and turned to the front. Sacral bone - concave, short and wide than in the male pelvis, which also increases the capacity of the cavity of the female pelvis.

the pelvic structure
Taz (women's):
1 - sacrum;
2 - wing Ilium;
3 - acetabulum;
4 - sciatic mound;
5 - pubic bone;
6 - pubic Union;
7 - locking hole;
8 - big sciatic notch;
9 - upper anterior iliac spine;
10 - the iliac crest.
At the bottom right, for comparison - pubic corner of the pelvis men.

The size and the identification of the points of the great basin (see Midwifery research) to judge the viability of the small pelvis in childbirth. A decrease of one of the big hips a 2 cm or more indicates a narrowing of the small pelvis (see Narrow pelvis). The pelvis is particularly important, representing a path that passes the fetus during birth. To determine the position of the head of the fruit in the pelvis are identifying points through which mentally conducting plane. There are the following four planes.
1. The plane log is limited in the back and hips Cape (promontory), on the sides - the nameless (edge) lines, front - top edge of the symphysis. Dimensions: straight from the top of the symphysis to promontory -11 cm; the cross is the most distant point on the boundary line -13 hedgehog; oblique from sacroiliac joint one side to the pubic-iliac ledge on the other -12 see
2. The plane wide part of the small pelvis borders behind - the connection II and III of the sacral vertebrae, Bonham - the middle of the opposite sides acetabular depressions, front - mid back surface of the symphysis. Dimensions: direct - from the middle of the back surface of the symphysis to the junction of the II and III of the sacral vertebrae - 12.5cm; cross - between the inner surfaces of the acetabular depressions - 13,5 see
3. The plane narrow part of the small pelvis passes back through sacrococcygeal articulation, laterally through the sciatic spine, front - through the bottom edge of the symphysis. Dimensions: direct - from the bottom of the symphysis to sacrococcygeal joint - 11 cm; cross - distance between the sciatic awn - 10,5 see
4. The plane of the output of small pelvis limited behind the tip of the coccyx, on the sides - the sciatic mounds, front - bottom edge of the symphysis. Dimensions: direct - from the bottom of the symphysis to the tip of the coccyx - 9.5 cm (in childbirth coccyx is deflected backwards and the size of the input increases by 1.5-2 cm); cross - distance between the sciatic mounds - 11 see
In obstetrics are important (for positioning of the bodies, the level of the head of the fruit) so-called parallel to the plane on Goju (four of them): the first terminal (border) - passes through the top edge of the symphysis; second, the main (first parallel) - passes through the lower edge of the symphysis; third - spinal - passes through the sciatic parallel to the spine of the first two; the fourth - plane exit - passes through sacrococcygeal articulation, coinciding with the direction bent coccyx, the usual provisions for women outside the birth.
The line connecting the centers of all direct size of the pelvis, called wired axis of the pelvis (form it resembles a fishing hook).