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. Different sources say different things, but it seems to be no fewer than six days and no longer than fourteen.
In short, it soon became apparent that a new stage of life â the teenage phase â was becoming a reality in America. American adolescents were displaying traits unknown among children and adults. Although the word teenager did not come into use until decades later, the teenage mindset dawned in the 1920s.
Others have argued that this use of the term is the result of a misunderstanding of the original proposal. The word meme is a neologism coined by Richard Dawkins. It originated from Dawkins' 1976 book The Selfish Gene.