Do different phases of menstrual cycle affect the HR, PR interval and duration of ST segment?: A study

Alteration in the release of female steroid hormones like progesterone and estrogen a systematic manner is due to periodic ovarian variation. The alteration causes physiological cardiovascular activities ultimately affects Electrocardiogram (ECG) parameters. : To analyze heart rate changes PR interval duration ST segment ECG during menstrual phases. investigate any change rate, different phases cycle. 30 apparently healthy aged between 18-25 years were selected for study was recorded using Electrocardiograph phase cycle:- a): Menstrual phase(MP) (2nd day), b): Proliferative phase(PP) (11th day) c): Secretory phase(SP) (22nd day). Statistical analysis paired t-test done by online statistical calculator. There significant Heart duration. HR increased more as compared phase, it showing p-value 0.000133 with secretory phase. no proliferative on comparison Phase. Cyclical fluctuation cycle electrophysiological parameters, affecting system.