not planned in advance 未计划（或筹划）的；意外的 an unplanned pregnancy 意外怀孕 The clinic provides advice on unplanned pregnancies. 诊所提供有关意外怀孕的咨询建议。 The violent incidents were isolated and usually unplanned. 暴力事件是孤立的，通常是无计划的。
Oxford Collocations DictionaryUnplanned is used with these nouns:- pregnancy