When a human female reaches a certain as then vaginal bleeding occurs for a few days after regular intervals of time: (a) what is this process known as (i) in scientific terms, and (i) in everyday language?
(b) what is the human female sad to have attend at this stage?
(c) what does the onset of this process in human female signify?
(d) at what particular event in the life of a human female this process stops temporarily but starts again?
(e) what name in given to the event when this process stop permanently?
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