About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occurs?

About which day in a normal human menstrual cycle does rapid secretion of LF (popularly called LF surge). Normally occurs?

About which day in a normal human menstrual cycle does rapid secretion of LH normally occurs ?

On which day of normal menstrual cycle, ovulation occurs?

On which day of the normal menstrual cycle, ovulation occurs ?

On which day of the normal menstrual cycle, ovulation occurs?

On which day of the normal menstrual cycle, ovulation occurs?

On which day of the normal menstrual cycle, bleeding occurs?

On which day of the menstrual cycle does ovulation take place ?