An egg lives for around 12 hours after ovulation. Sperm can live for about five days inside the uterus, so providing those two time frames collide, it can be pretty soon after sex. Hours, usually. Implantation occurs between 6 - 12 days.
The word eugenics was coined in 1883 by the English scientist Francis Galton, a cousin of Charles Darwin, to promote the ideal of perfecting the human race by, as he put it, getting rid of its undesirables while multiplying its desirables -- that is, by encouraging the procreation of the social Darwinian fit and discouraging that of the unfit ...
The term Wi-Fi, commercially used at least as early as August 1999, was coined by brand-consulting firm Interbrand Corporation. The Wi-Fi Alliance had hired Interbrand to determine a name that was a little catchier than 'IEEE 802.11b Direct Sequence'.