Basic survey of menstrual cycle

月经周期基本调查

• 批准号: 15590552
• 负责人: ANAI Takanobu
• 金额: $ 1.34万
• 依托单位: Oita University (2004)大分医科大学 (2003)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15590552/
• 关键词: Menstrual cycle; Follicular phase; Luteal phase; Duration of menstruation; Irregularity of the menstruation; Basal body temperature; 出血持続日数

The present definition of normal menstruation for Japanese women was based on the survey carried out in 1962. The definition of that is in the following ; regular cycle : 25-38 days, cycle variation : less than or equal 6 days, follicular phase : 17.9±6.2 days, luteal phase : 12.7±1.6 days, menstrual flow : 5-7 days. The length and variation of menstrual cycle is under the influence of anthropometry, nutrition, and race of women. Because of possible variation of the menstrual cycle in over 40 years, the definition of normal menstrual cycle needs re-evaluation. Knowledge of the length and variation of the menstrual cycle is necessary for the assessment of menstrual irregularities.We asked 120 health women to record her basal body temperature at least for 6 months. The results of our survey are in the following ; regular cycle:26-38 days(mean 31.1±5.9 days), cycle variation : less than or equal 5 days, follicular phase : 19.1±5.6 days, luteal phase : 11.9±2.2 days, menstrual flow : 5-7 days. With the exception of the mean duration of follicular and luteal phase, our re-evaluation did not affect the present definition. The follicular phase is prolonged 1.2 day, and the luteal phase is shortened 0.8 day. Those findings have taken place slowly over the past 40 years, and its significance remains obscure. Despite the western life style, the mean length of menstrual cycles in Japanese women is prolonged for 3days compared with those of Caucasian women. The shortened menstrual cycle means increased menstrual cycles in the life, suggesting high exposure of estrogen in Caucasian women.

目前日本女性正常月经的定义是基于1962年进行的调查。其定义如下：正常周期：25-38天，周期变化：小于或等于6天，卵泡期：17.9 ±6.2天，黄体期：12.7±1.6天，月经量：5-7天月经周期的长度和变化受人体测量的影响，由于 40 多年来月经周期可能存在差异，因此需要重新评估正常月经周期的定义，以评估月经不规律。我们要求120名健康女性记录至少6个月的基础体温，调查结果如下：规律周期：26-38天（平均31.1±5.9天）。变异：小于或等于 5 天，卵泡期：19.1±5.6 天，黄体期：11.9±2.2 天，月经量：5-7 天，除了卵泡期和黄体期的平均持续时间外，我们重新评估。不影响目前的定义。卵泡期延长 1.2 天，黄体期缩短 0.8 天。过去40年来，尽管采用了西方生活方式，但日本女性的月经周期平均长度比白人女性延长了3天，这表明月经周期的缩短意味着生命周期的延长。白种人女性雌激素水平较高。