Excerpts from Books and Wikipedia
"Struensee's rule deeply offended the conservative Danish aristocracy, and a plot was hatched to arrest him, the queen, and the king's keeper, Brandt, an ally of Struensee. The palace coup was triggered by the birth of a daughter, Louisa Augusta, to the queen, universally believed to be Struensee's child. In January 1771 the trio were arrested." [1001 Days]