Annals of Biomedical Engineering

, Volume 37, Issue 9, pp 1827–1838 | Cite as

Estimation of the Biphasic Property in a Female’s Menstrual Cycle from Cutaneous Temperature Measured During Sleep

Article

Abstract

This paper proposes a method to estimate a woman’s menstrual cycle based on the hidden Markov model (HMM). A tiny device was developed that attaches around the abdominal region to measure cutaneous temperature at 10-min intervals during sleep. The measured temperature data were encoded as a two-dimensional image (QR code, i.e., quick response code) and displayed in the LCD window of the device. A mobile phone captured the QR code image, decoded the information and transmitted the data to a database server. The collected data were analyzed by three steps to estimate the biphasic temperature property in a menstrual cycle. The key step was an HMM-based step between preprocessing and postprocessing. A discrete Markov model, with two hidden phases, was assumed to represent higher- and lower-temperature phases during a menstrual cycle. The proposed method was verified by the data collected from 30 female participants, aged from 14 to 46, over six consecutive months. By comparing the estimated results with individual records from the participants, 71.6% of 190 menstrual cycles were correctly estimated. The sensitivity and positive predictability were 91.8 and 96.6%, respectively. This objective evaluation provides a promising approach for managing premenstrual syndrome and birth control.

Keywords

Hidden Markov model (HMM) Data mining Body temperature Long-term monitoring Mobile phone QR code 

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Copyright information

© Biomedical Engineering Society 2009

Authors and Affiliations

  1. 1.Lab of Biomedical Information TechnologyThe University of AizuAizu-wakamatsuJapan
  2. 2.QOL Co., Ltd.TokyoJapan
  3. 3.Graduate School of Human SciencesWaseda UniversityTokorozawaJapan

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