Other primates also have a wider and straighter birth canal that allows a fetus to pass through more effectively. Modern human’s shorter upper extremities and evolution of bipedal locomotion may have placed a premium on assistance during labor. For this reason, researchers argue that assisted labor may have evolved with bipedalism. Obstructed labor has been documented as a complication of childbirth since the field of obstetrics originated. For over 1,000 years obstetricians have had to forcibly remove obstructed labor fetuses to prevent the death of the mother.Prior to the existence of the cesarean section, fetuses that were obstructed had a low survival rate. Even in the 21st century, if obstructed labor is left untreated, it could result in mother and infant death. Although surgical removal of the fetus is the preferred method of managing obstructed labor, manual removal using medical tools is also common.Obstructed labor is unique to humans compared to other primates. The evolution of humans to become obligate bipedal and increase in brain size create the problems associated with obstructed labor. In order for bipedal locomotion to be possible, many changes had to occur to the skeletal structure of humans, especially in the pelvis. Both the shape and orientation of the pelvis changed. Other primates have straighter and wider pelvises compared to humans. A narrow pelvis is better for bipedal locomotion but makes childbirth more difficult. The pelvis is sexually dimorphic, with females having a wider pelvis to be better suited for childbirth.
Serositis refers to inflammation of the serous tissues of the body, the tissues lining the lungs (pleura), heart (pericardium), and the inner lining of the abdomen (peritoneum) and organs within. It is commonly found with fat wrapping or creeping fat. Causes
Serositis is seen in numerous conditions:
Lupus erythematosus (SLE), for which it is one of the criteria,
Rheumatoid arthritis
Familial Mediterranean fever (FMF)
Chronic kidney failure / Uremia
Juvenile idiopathic arthritis
Inflammatory bowel disease (especially Crohns disease)
Acute appendicitis
Diffuse cutaneous systemic sclerosis

See also
Hyaloserositis

References


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