The phrase "at their inception" is correct and usable in written English.
It can be used to refer to the initial stage or beginning of something, often in discussions about ideas, projects, or organizations.
Example: "The company's core values were established at their inception, guiding its growth and development over the years."
Alternatives: "at the outset" or "at the beginning".
When the Tamil insurgency began, it was a middle-class movement, as such nationalistic movements often are at their inception.
At their inception, the awards, sponsored by San Pellegrino water since 2007, were based on informal polling of people in the food world.
One shows love and a shared life at their inception; the other shows life, and the love that it sustained, ending.
Graham Gano, the team's training-camp kicker, is in the United Football League; Matt Stover, who replaced Lou Groza in 1968 and was the Ravens' kicker at their inception, was signed by the Colts a month ago.
For some time now, the mortgage insurer has refused to pay claims on thousands of stated-income loans it insured, on the unsurprising grounds that the loans were fraudulent at their inception and thus violated the terms under which the company insured them.
Both final phases are played in voluminous Hanshin Koshien Stadium in Nishinomiya, near Kobe, and both tournaments, which were sponsored at their inception by rival newspapers that continue to ensure their extensive coverage, predate the N.C.A.A.'s, which began in 1939.
Her generous contributions supported the Brachytherapy Suite and Adult Day Hospital both of which, at their inceptions, represented innovative ways of delivering cancer care.
Carelessly sneered at since their inception, UB40 have simply got on with it.
In frustration, they threw off this burden at their very inception, left with only some misremembered words to cling on to.
The Pan American Games had their inception at a meeting of the Pan American Congress in Buenos Aires in 1940, attended by representatives of the national Olympic committees of 16 countries.
Dwight Macdonald once called the Ford Foundation "a large body of money completely surrounded by people who want some," but Fleishman contends that foundations, since their inception, at the start of the twentieth century, have given the U.S. a significant advantage in economic and social development.
