Heart rate variability among eumenorrhea & dysmenorrhea subjects was compared.
Different phases of menstrual cycle in eumenorrhea subjects showed no difference in time domain parameters of HRV. In dysmenorrhea subjects there was a significant increase in parasympathetic activity in follicular phase compared to menstrual phase. This suggests the complex physiological homeostatic mechanisms plays a role to maintain autonomic balance even when the autonomic disturbances occur.
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