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Jpn J Nurs Sci. 2012 Jun;9(1):112-8. doi: 10.1111/j.1742-7924.2011.00191.x. Epub 2011 Sep 16.

Working conditions associated with ovarian cycle in a medical center nurses: a Taiwan study.

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  • 1Department of Respiratory Therapy, College of Medicine, Chang Gung University, Kwei-Shan, Taiwan.



Decreased basal body temperature measurements predict ovulation with an accuracy of 74%. The anovulatory cycle exhibits an ovarian monophasic pattern. This study evaluated the relationship between ovarian cycle pattern and sociodemographic characteristics, menstrual history and work characteristics of nurses in a Taiwan medical center.


Of 200 nurses recruited, 151 were analyzed. Each subject completed questionnaires and provided life recordings and daily basal body temperature measurements during the 14-week study.


The analytical results demonstrated that work place (P = 0.014) and work shift (P = 0.048) are significantly related to ovarian cycle pattern. Nurses who worked in emergent care units and wards had a higher prevalence of irregular ovarian cycle pattern. Approximately 53% of nurses who worked rotating shifts exhibited irregular ovarian cycle pattern.


Nurses who either had rotating shift work or worked in emergent care units and wards should be concerned with their own ovarian cycle pattern for their health.

© 2011 The Authors. Japan Journal of Nursing Science © 2011 Japan Academy of Nursing Science.

[PubMed - indexed for MEDLINE]
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