Primary Objective: This study primarily aims to compare skin aging characteristics between women at different stages of reproductive aging in both sun-exposed and non-exposed areas, based on skin indicators collected during a single laboratory visit. Furthermore, through a 30-day at-home tracking period (for the late-stage and postmenopausal groups) or one menstrual cycle (for the early-stage and young group), we seek to analyze the temporal dynamics of changes in skin condition, mood, sleep quality, and menopausal hot flashes. Secondary Objective: The secondary objective is to examine differences in skin conditions across life stages by recruiting mother-daughter pairs (where the young group consists of the biological daughters of the late-stage and postmenopausal groups). The core focus is to leverage shared genetic backgrounds to explore how skin characteristics, particularly in different body areas, may change over time or in response to hormonal fluctuations. By comparing these characteristics across age groups, this study seeks to identify key variation patterns and their contributing factors, thereby laying the groundwork for further mechanistic investigations and practical applications.
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Clinical Assessment
Timeframe: The assessment is performed as a single evaluation at the T1 (baseline) laboratory visit .
Skin Wrinkle and Smoothness Assessment
Timeframe: The assessment is conducted as a single measurement at the T1 (baseline) time point .
Skin Color Measurement with Colorimeter
Timeframe: The measurement is performed as a single assessment at the T1 (baseline) laboratory visit.
Skin Elasticity Measurement with Cutometer® MPA580
Timeframe: The measurement is performed as a single assessment at the T1 (baseline) laboratory visit .
Skin Ultrasound Diagnostic System Ultrascan UC22
Timeframe: The measurement is performed as a single assessment at the T1 (baseline) laboratory visit.
Skin Moisture Loss Meter Vapometer
Timeframe: The measurement is performed as a single assessment at the T1 (baseline) laboratory visit .
Skin Hemoglobin Measurement with Mexameter® MX18
Timeframe: The assessment is performed as a single measurement at the T1 (baseline) laboratory visit .
Intelligent Skin Analyzer Skinmeter
Timeframe: The measurement is performed at three designated time points during the study: T1( Day1),T2(Day 15), and T3(Day 30).
Skin Sebum Measurement with Sebum-Test Paper
Timeframe: The measurement is performed at three designated time points during the study: T1( Day1),T2(Day 15), and T3(Day 30).
Sleep Duration Recording
Timeframe: Sleep data is collected continuously throughout the entire tracking period of the study.Day1 to Day 30.