早发月经初潮女生的手腕骨发育特征

目的探讨性成熟较早的女孩手腕骨骨龄、重点标志及骨皮质发育特点,为临床医学、预防医学相关实践和基础理论研究提供科学依据。方法在青春期发育调查基础上,选择11岁前发生月经初潮的62名女生,拍照手腕骨X线片,判定骨龄,并观察重点骨发育标志,测量第Ⅱ掌骨骨皮质厚度。结果被检女生的月经初潮年龄均值为10.6岁,平均骨龄达13.3岁,其中52人(83.9%)初潮骨龄处于13.0～14.0岁之间。该群体的初潮平均骨龄比她们的初潮平均时间年龄大2.7岁。本组女生月经初潮时59人拇指内侧种籽骨已萌出,但有3例尚未见该籽骨。被检对象的第Ⅱ掌骨皮质厚度已达到该地区12.3岁发育水平。结论采用平均骨龄预测女孩月经初潮,无论对普通女孩,还是对性成熟较早者,均有实际意义。

Development features of carpus among girls with early menarche

Objective To describe the development features of carpus's bone age,key markers and bone cortex among girls with early menstruation,and to provide scientific evidence for both practical and theoretical research in the field of medicine.Methods On the basis of investigation into puberty condition,62 girls whose menstruation came before 11 years old were chosen.They were given carpus's X-ray for judging bone age,discerning the key markers of bone development and measuring the thickness of the second metacarpus cortex.Results For those sampled girls,their average age was 10.6 years old when menarche occurred while their average bone age reached 13.26 years old,among them there were 52 girls(83.9%)whose bone age was estimated from 13.0 to 14.0 years old.Therefore,it was calculated that their average bone age was 2.66 years older than their actual menarche age.Among those girls,there were 59 girls whose seed sesamoid of thumbs already grew up at menarche.Further more,the cortex thickness of the second metacarpus in the girls reached the thickness of the local girls at 12.3 years old.Conclusion Average bone age of girls can be used to predict their menarche,which means a lot both for normal girls and for girls with early menarche.