The UFC has stepped in and called off the Aspen Ladd vs. Macy Chiasson fight slated for UFC Vegas 38 on Saturday ... after Ladd appeared dangerously frail during the weigh-in.
The scene was scary -- Ladd was visibly shaking and barely able to hold her arms up as she stepped on the scale ... with many concerned about her health as she tried to make weight at 135 pounds.
Ladd eventually weighed in at 137 -- 2 pounds over the bantamweight limit -- but there was no way Dana White's org.