<prompt> Polymenorrhoea Means:a Menses 21 days b Menses 35 daysc Painful mensesd DUBbcadab  <response>: A normal menstrual cycle lasts from 21 -35 days, with 2 - 6 days of flow and an average blood loss of 20 to 60 ml. Mean blood loss per cycle is 35 mL since 35 mL is not given in option, so 5O mL is being taken as the correct answer. Mean duration of menses is 4.7 days.Irregularities in Normal Menstrual Cycle: 