The study from the Universities of Arizona and Wisconsin-Madison found parental supportiveness, less marital conflict and depression may play a key in the later onset of puberty.

• 这份亚利桑纳与威斯康辛大学麦迪逊分校所作的研究发现，父母的照护、较少的婚姻冲突与忧郁，可能是导致青春期较晚开始的一项重要因素。