The United States Court of Appeal for the Federal Circuit in the District of Columbia came down with another blow for the patentability of biotech testing products on Friday, June 12, 2015. The Court affirmed the 2013 decision of Judge Susan Illston of the Northern District of California holding that Sequenom Inc.'s patent issued for a hugely popular, non-invasive prenatal test, which uses cell-free fetal DNA circulating in the blood of pregnant woman was unpatentable subject matter because it is a natural phenomenon.