The back of Cain's head hit the ice before LeDuc fell on top of her. The 23-year-old initially appeared unconscious when LeDuc lifted her head off the ice but she got up and they completed their program.
U.S. Figure Skating said on Twitter it would provide an update on Cain's condition when it becomes available.
Cain, who has been skating with LeDuc since May 2016, is the 2018 Four Continents silver medallist and 2017 U.S. national bronze medallist. (Reporting by Rory Carroll; Editing by Peter Rutherford )
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