Parasympathetic Nerve Function Status During Different Phases Of Menstrual Cycle In Healthy Young Women.
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Date
2011-12
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Abstract
Background: Autonomic nerve function status may be changed during follicular and late luteal
phases of menstrual cycle due to fluctuations of serum estrogen and progesterone levels. This
alteration in autonomic nerve functions may affect cardiovagal control and usually associated with
decreased parasympathetic activity in late luteal phase. Objective: To observe the parasympathetic
nerve function status during follicular and late luteal phases of menstrual cycle and also their
relationships with serum estrogen and progesterone levels in healthy young women. Methods: This
cross-sectional study was carried out in the Department of Physiology, Sir Salimullah Medical College
(SSMC), Dhaka from 1st January 2009 to 31st December 2009. A total number of thirty (30) apparently
healthy unmarried women age ranged from 20-25 years were studied in both follicular (phase A,
control) and late luteal (phase B, study) phases of menstrual cycle. Simple autonomic nerve function
tests like heart rate (HR) response to valsalva maneuver (valsalva ratio), HR response to deep breathing,
HR response to standing (30th:15th ratio) were done to assess parasympathetic activity and serum
estrogen and progesterone levels were also measured by AxSYM method. All these tests were performed
in both follicular and late luteal phases of menstrual cycle of the same subject. Data were analysed by
paired student’s ‘t’ test and Pearson’s correlation coefficient test as applicable. Results: Mean values
of both HR response to valsalva ratio and HR response to standing (30th:15 th ) were non-significantly
decreased but HR response to deep breathing was significantly (p<0.05) decreased in late luteal phase
than those of follicular phase. Conclusion: From this study it can be concluded that parasympathetic
activity is decreased in late luteal phase of menstrual cycle.
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Keywords
Parasympathetic nerve functions, Progesterone, menstrual cycle
Citation
Choudhury Rama, Jahan Nasim, Sultana Nayma, Akter Rezina, Khanum Ayesha Akhter. Parasympathetic Nerve Function Status During Different Phases Of Menstrual Cycle In Healthy Young Women. Journal of Bangladesh Society of Physiologists. 2011 Dec; 6(2): 100-107.