One sceptic is Karolinska Institute endocrinologist Claude Marcus, whose work includes assessing the biological maturity of people to see if they went through puberty earlier or later than usual.
其中一名怀疑者就是卡罗琳学院的内分泌学家克劳德·马库斯，其工作包括评估人们的生物成熟度以判定他们是否早于或晚于正常年龄经历青春期。