Routinely created for two reasons: avoidance of legal issues for working with pure human embryonic stem cells and to assay the viability of donor males for in vitro fertilisation—the hybrid cells used to map and predict genetic traits and inheritance—and to test for infertility on the part of prospect fathers, what’s colloquially known as the hamster test is considered highly unreliable yet remains a benchmark test in the US and UK. Sperm subject to assessment are incubated with hamster ova which have had the outer cell coat removed (zona pellucida, the protective membrane in place to only allow species specific penetration to occur) and considered to have passed muster if they fuse with the eggs. Generally destroyed during the conclusion of this rather monstrous exercise (like the early Friedman Test for pregnancy that involved sacrificing a rabbit or culling male chickens and the GOP’s preoccupation with being bathroom monitors) and not allowed to continue dividing, the unviable chimeric embryos are referred to as humsters.