The science of either preventing revolting, dirty or otherwise objectionable people from reproducing.
Alternatively, preventing unwanted reproduction by cock-blocking lovebirds with something disgusting, most appropriately a third person's poor personal hygiene.
The ewgenics program is an advanced form of birth control that involves turning off peoples' showers until they are too smelly to consider getting close enough to make babies.
Newgenics is not just the breeding of people based on a genetic basis, but also based on level of education, wealth and other traits considered desirable.
Jane was a product of newgenics and was sterilized for being poor.