A combination of these two issues is also possible. Pelvic exostoses: These are bony growths on the pelvis. Spondylolisthesis: This is a condition in which a bone in the spine slips out of its proper position onto the bone below it. It is important to note that abnormal fetal presentations i. Some consider this to be a form of cephalopelvic disproportion. Terminology may vary, but it is critically important that medical professionals examine the mother and fetus extensively enough to understand not only that there is something preventing the fetal head from making its way through the birth canal, but also exactly what the problem is.
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Abnormal shape of the pelvis due to diseases like rickets, osteomalacia or tuberculosis. Abnormal shape due to previous accidents. Tumors of the bones. Childhood poliomyelitis affecting the shape of the hips. Congenital dislocation of the hips. Congenital deformity of the sacrum or coccyx. Problems with the Genital tract: Tumors like fibroids obstructing the birth passage. Congenital rigidity of the cervix. Scarring of the cervix due to previous operations like conisation. Congenital vaginal septum.
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The fetal head also has a great capacity to mould - the skull bones can overlap to some extent and decrease the diameter of the head. An estimation of the size of the pelvis can be made by two methods: Clinical Pelvimetry: The assessment of the size of the pelvis is made manually by examining the pelvis and palpating the pelvic bones by vaginal examination. It is usually carried out after 37 weeks of pregnancy or at the time of the onset of labor.
The diameter of the pelvis is measured with the index and middle fingers of the hand. Radiological Pelvimetry:Xrays or CT scans are taken of the pelvis in different angles and views and the pelvic diameter measured. But this method is not done nowadays as it can cause radiation toxicity to the baby.
Treatment of Cephalopelvic Disproportion CPD : If the surgeon is absolutely certain that there is cephalopelvic disproportion, then a Cesarian section is the only option to deliver the baby. If, after sufficient time has passed in labor without a delivery , and symptoms of prolonged labor or fetal distress begins to develop, a cesarian section needs to be carried out.
It can be scary, and you might start to think about all the things that can go wrong. A common worry is that the baby will be too big or get stuck. But what are the chances that could really happen? Cephalopelvic disproportion CPD is a medical issue that can arise during childbirth. It occurs when a baby is having trouble getting through the birth canal. It is very rare.
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Abnormal shape of the pelvis due to diseases like rickets, osteomalacia or tuberculosis. Abnormal shape due to previous accidents. Tumors of the bones. Childhood poliomyelitis affecting the shape of the hips. Congenital dislocation of the hips. Congenital deformity of the sacrum or coccyx. Problems with the Genital tract: Tumors like fibroids obstructing the birth passage.