Pelvis Anatomically Narrow

An anatomically narrow pelvis (ANA) is a pelvis reduced in width by 0.85 times or less and in length by 2-3 times the size of the pelvis in women measuring 25 x 28 cm or less. The common form of SAU occurs in 15-20% of women.

Causes of this syndrome: _insufficient activity during intrauterine development_ _,_ _fetal pathology during pregnancy 7-14 weeks, obstetric injuries during delivery_ _354-386 g of fetus._

After vaginal delivery with normal pelvic sizes, rapid normalization is usually observed (during the first year of life), and therefore the term physiological narrow pelvis is widely used. In contrast, gynecologists use the phrase anatomically narrow pelvis in nulliparous women. Physiological narrow pelvis is not considered a cause of maternal or perinatal morbidity. A high exit of the baby's head requires more time for its advancement through the entrance of the pelvis (excessive mobility of the head leads to infringement of its exit). To slow down this process, so-called “auxiliary obstetric aids” are applied - external-internal rotation, anterocephalic flexion under direct visual control. After the birth of the head, gentle fetal traction techniques are performed through the pelvic floor. If the head or legs remain in the pelvis during labor, which is possible with a pathologically narrowed pelvis, the fetus is removed