She experienced 'complications' during her pregnancy.
The negotiations stalled when 'complications' arose.
The patient died of 'complications' from surgery.
(..) you have them. Otherwise we won't be able to beam them back. Kirk and Spock are on their own now. I foresee a complication. The design of this ship... is far more advanced than I have anticipated. Voice print and face recognition analysis enabled. (..)2009 Star Trek