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.
1814, coined by physician, physicist and Egyptologist Thomas Young (1773-1829) and first used in an article in the Quarterly Review, from Indo-, comb. form of Greek Indos India + European. Common to India and Europe, specifically in reference to the group of related languages and to the race or races characterized by their use.