Larsen S B, Kragstrup J
Aarhus Universitet, Institut for Almen Medicin.
Ugeskr Laeger. 1997 Nov 3;159(45):6676-9.
The age at menarche and first intercourse was analyzed from data obtained from a questionnaire sent to 1500 17 year-old randomly selected Danish women (76% responded). The average age at menarche was 13.37 years (SD: 1.24). The median age at the time of the first intercourse was 16.6 years. Late sexual debut was observed for girls who were relatively old at menarche and for those with a higher level of education. Apparently the age at menarche and at first sexual intercourse has not changed significantly in recent years.
通过向1500名随机挑选的17岁丹麦女性发放调查问卷（76%的人做出回应）所获得的数据，对初潮年龄和首次性交年龄进行了分析。初潮的平均年龄为13.37岁（标准差：1.24）。首次性交时的年龄中位数为16.6岁。初潮年龄相对较大的女孩以及受教育程度较高的女孩出现首次性行为较晚的情况。显然，近年来初潮年龄和首次性交年龄并未发生显著变化。
