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A new method to detect significant basal body temperature changes during a woman's menstrual cycle


Freundl, G and Frank-Herrmann, P and Brown, S and Blackwell, L, A new method to detect significant basal body temperature changes during a woman's menstrual cycle, European Journal of Contraception and Reproductive Health Care, 19, (5) pp. 392-400. ISSN 1362-5187 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 The European Society of Contraception and Reproductive Health

DOI: doi:10.3109/13625187.2014.948612


Objective: To compare the results of a computer programme based on the Trigg's tracking system (TTS) identification of the basal body temperature (BBT) shift day from daily records of BBT values (TTS transition day), with the BBT shift day identified from the same records using the Sensiplan® symptothermal method of natural family planning.

Methods: A computer programme was written to display the daily BBT readings for 364 menstrual cycles from 51 women aged 24 to 35 years, obtained from the German Natural Family Planning (NFP) database. The TTS transition day so identified from each record was then compared with the BBT shift day estimated from the same record by the Sensiplan® method.

Results: Total agreement between the methods was obtained for 81% (294/364) of the cycles and 18% (67) cycles differed by ± 1 day. For the 364 pairs of values distributed among 51 women the medians of the differences between the TTS transition day and Sensiplan® initial day of the BBT rise (shift day) were not significantly different (χ2 = 65.28, df = 50, p = 0.07205).

Conclusion: The advantages of the tracking signal algorithm are that in many cases it was possible to identify the BBT shift day on that very day – rather than only some days later – and to estimate the probability that a transition had occurred from the different values of the tracking signal.

Item Details

Item Type:Refereed Article
Keywords:basal body temperature changes, ovulation, Sensiplan®, symptothermal method, Trigg's tracking signal
Research Division:Biomedical and Clinical Sciences
Research Group:Reproductive medicine
Research Field:Reproduction
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Brown, S (Dr Simon Brown)
ID Code:98381
Year Published:2014
Web of Science® Times Cited:8
Deposited By:Health Sciences A
Deposited On:2015-02-13
Last Modified:2015-05-18

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