See photos of stone fetuses here. Disease fighting capability naturally protects the body from foreign objects, calcifies the fetus dies themAfter, the mother’s immune system goes to function protecting her very own body from the fetus that’s deemed by your body to become a ‘international object.’ In this case, the mother’s body had been encasing and calcifying a fetus for over 40 years! ‘When you get older cartilage in the knee, it calcifies,’ Garcsi explains. The calcification of the mother is guarded by the cells from infection, but does mean the ‘rock’ baby can remain in the abdominal undetected for decades.Detecting antibodies were peroxidase-conjugated donkey antibodies against human IgG, guinea pig IgG , or sheep IgG . Immunoglobulins were acid-eluted from the remnant cores of kidney-biopsy specimens from patients with membranous nephropathy, lupus membranous nephropathy, or IgA nephropathy . This eluted IgG was used to immunoblot the human glomerular recombinant or extract PLA2R directly. Mass Spectrometry Data and Analysis Interpretation We excised regions of interest from gels identical to those used for Western blotting and performed in-gel tryptic digestion, as previously described.13 We analyzed the resulting peptides by using a modified version of a way that couples liquid chromatography with tandem mass spectrometry14 and entered the acquired data into existing databases of individual proteins to recognize relevant proteins in our patients.