1·But in the past 40 years, there hasn't been any real change in age of menarche, which remains at just over 12 years.
但是在过去的40年间，初潮发生的年龄段并没有实质性的改变，还是在12岁左右。
2·Smoking in male and age of menarche in female influenced BMD.
男性吸烟、女性初潮年龄对骨密度有一定的影响。
3·Objective to explore the correlation between timing of menarche and central obesity, and to provide scientific evidence for the intervention of childhood obesity.
目的探讨初潮年龄与中心性肥胖之间的关系，为儿童肥胖的干预研究提供科学依据。
4·Conclusion: Not only the genetic factors but also the uterine environment and the development in childhood are related to the age at menarche.
结论女孩初潮年龄不仅与遗传因素有关，而且与宫内环境和儿童时期的发育有关。
5·Girls go through menarche between the ages of 9 and 16, and the variations in LIN28B accounted for just one to three months of these differences.
女孩们在 9岁到 16岁之间经历初潮，而这些年龄的差异中，其中一到三个月的差异是由基因 LIN28B 差异导致的。