Freemartins are occasionally used in stem cell and immunology research.  During fetal development cells are exchanged between the fused circulations of the bovine twins. Up to 95% of the freemartin's blood cells can be derived from those of her twin brother. Male-derived cells and their progeny can be easily visualized in the freemartin tissues, as only they contain the male Y chromosome . Thus, by analyzing these tissues, one can investigate the capacity of hematopoietic stem cells or other circulating cells to produce other tissues in addition to blood. The freemartin model allows one to analyze perfectly healthy and unmanipulated animals, without resorting to transplantation often used in stem cell research.
Maple Syrup Urine Disease (MSUD) is a condition that results from improper metabolism of branched-chain amino acids. The aromatic in fenugreek, sotolon, may be used as a diagnostic criteria for MSUD as it exists in the urine of those persons with this metabolic defect and gives the characteristic sweet-scent.  It normally does not appear in healthy person's urine due to no dietary intake, but may appear in those who drink or consume fenugreek, leading to a false diagnosis.  Maternal consumption of sotolon can also transfer into the baby after birth, and cause trans-generational false diagnosis. 
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