Mitochondria are structures within cells that play an essential role in energy production.
Mitochondria have their own DNA, that is known as mitochondrial DNA or mtDNA.
mtDNA content in an embryo predicts its implantation potential.
An increase in the mtDNA in the embryo indicates a low level of energy and implantation potential.
Mitochondrial DNA content as a viability score in human euploid embryos: less is better. Diez-Juan et al.Fertil Steril. 2015 Jun11.doi:10.1016/j.fertnstert.2015.05.022