Also read about Sacroiliac Joint Dysfunction, also men and women never being pregnant get this disease:
pub123.ezboard.com/fsunsh...=313.topic
Here is a good website in English:
www.plus-size-pregnancy.o...icpain.htm
About the cause (from the site above):
No one knows why SPD occurs for sure, or why it happens in some women and not in others. Some ethnic groups report a high incidence, especially Scandinavian women and perhaps Black women. Other risk factors may include having lots of kids, having had large babies, pre-existing problems with this joint, past pelvic or back pain, or past trauma (car accident, obstetric trauma, etc.) that may have damaged the pelvic girdle area. It also seems logical that women who have broken or injured their pelvis in the past would probably be prone to this problem.
Some sources view SPD simply as a result of pregnancy hormones. As noted, the pregnancy hormones relaxin and progesterone tend to loosen the ligaments of the body in preparation for birth. One theory is that some women have high levels of hormones before pregnancy, and then additional pregnancy hormones cause excessive relaxation of ligaments, especially in the pelvis. Another theory is that women whose joints are especially flexible before pregnancy may be more susceptible to the effect of hormones, or that some women's bodies are just simply more affected by hormones than others. Traditional medical sources tend to view the problem of pelvic/pubic pain (when they acknowledge it at all) as simply a hormone problem.
A different theory holds that the problem usually results from a misalignment of the pelvis. In this view, if the pelvis gets out of alignment, the bones don't line up correctly in front, and this puts a lot of extra pressure on that pubic symphysis cartilage. The two sides are not aligned, restricting full range of motion, pulling on the connecting pubic symphysis, and making it quite painful. The more out of alignment it is, the more painful this area becomes. It also tends to affect the back, especially in the sacroiliac area, since the pelvis is interconnected and works as a unit. And since many areas are affected by back problems, pain can also extend to other areas too.
Kmom's opinion is that this condition is probably primarily a problem of misalignment, although hormone levels and sensitivity to hormones may also play a role. In her opinion, the first line of SPD treatment should probably address the possibility of misalignment. Others may not agree. But whatever the cause, SPD is certainly annoying and painful to deal with, and Kmom knows this from personal experience!
Here is more:
www.parentsplace.com/expert/midwife/qas/0,10338,239714_100857,00.html
Relaxin is a hormone that is secreted by the corpus luteum of pregnancy -- the placenta and the lining of the pregnant uterus.
Some previous data associated serum relaxin levels with pelvic pain, but these studies are few and conflicting. One study found a significant association between severe incapacitating pubic bone pain and relaxin levels in later pregnancy.
Some other researchers, however, were unable to confirm the finding in a study comparing disabling pelvic pain with relaxin levels in the thirtieth gestational week.
The role of relaxin is not totally understood. In the rat, it produces uterine relaxation. It has not been found to be absolutely necessary in the maintenance of pregnancy. When the cervix is exposed to this hormone, ripening does occur.
In a 1996 article published in the "American Journal of Obstetrics & Gynecology," there was a report of a significant positive correlation between mean relaxin value and pain located in the symphysis and the hip region, with onset during pregnancy. No back pain location showed any association with mean relaxin levels. However, among women reporting a combination of sacral pain on the one hand and symphyseal or lumbar pain on the other hand, there was a significant correlation with the mean relaxin value. No correlation was found between relaxin levels and any pain location with onset before pregnancy.
More research is currently being done on this substance.




California US
and I have disabling back pain after failed surgeries.