PROBLEM TO BE SOLVED: To construct a menstrual cycle measuring device that can easily estimate a menstrual cycle without being restricted by a measurement time zone, a posture, a place and an active state before measurement, construct the menstrual cycle measuring device capable of accurately measuring the menstrual cycle based on an objective indicator that is not a behavior change of a subject, and construct the menstrual cycle measuring device that eliminates the upsizing and complication of the device at low cost.SOLUTION: A menstrual cycle measuring device includes: an exhalation introduction with an exhaled air being blown from a subject a carbon dioxide concentration measuring unit for measuring the carbon dioxide concentration contained in the exhaled air blown from an exhalation introduction unit a carbon dioxide concentration memory unit for storing carbon dioxide concentration data measured by the carbon dioxide concentration measuring unit a menstrual cycle estimation unit for estimating the menstrual cycle of the subject based on the carbon dioxide concentration data accumulated in the carbon dioxide concentration memory and a display unit for displaying menstrual cycle estimation data estimated by the menstrual cycle estimation unit.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】測定時間帯や体勢、場所、測定前の活動状態に制限されずに手軽に月経周期を予測することができる月経周期測定装置の構築。被験者の動作変化などではなく、客観的指標に基づいて月経周期を正確に測定することができる月経周期測定装置の構築。装置の大型化や複雑化を招かない低コストの月経周期測定装置の構築。【解決手段】被験者から呼気が吹き込まれる呼気導入部、呼気導入部より吹き込まれた呼気中に含まれる二酸化炭素濃度を測定する二酸化炭素濃度測定部、二酸化炭素濃度測定部によって測定された二酸化炭素濃度データを記憶する二酸化炭素濃度記憶部、二酸化炭素濃度記憶部に蓄積された二酸化炭素濃度データに基づいて、被験者の月経周期を予測する月経周期予測部、及び、月経周期予測部によって予測された月経周期予測データを表示する表示部を、備える月経周期測定装置。【選択図】図1
