It happened during her comeback victory at Lake Placid, United States, the week before.
“I was concerned at the start when I was competing and felt quite dizzy,” said Yarnold, who did black-out on a run earlier in her career.
“It was the right decision to miss the race, come back to the UK to rest and have lots of tests because everything was then fine and I could come back with lots of confidence.”
Reigning world champion Shelley Rudman missed the 2014-15 season because of pregnancy, but fellow Britons Laura Deas and Rose McGrandle stepped up and finished on the podium on three occasions.
“I feel this has been a big break-through season for me,” said Deas, who claimed two World Cup medals.
“The GB women are the top nation in the world right now and we go to Germany with confidence but no complacency.”