It was claimed in this comment on this meta thread on The Workplace SE (referring to this Workplace question) that it is insulting to refer to women as "a female", instead of "a woman".
She's female. She's a woman. She's not a female. Google "women females" for further details.
The poster then later posted an answer to the question, which ended with this comment:
All this in mind, I've reverted JakeGould's edit. And please remember that the OP is a woman or female but she's not "a female"
However, there appeared to be significant disagreement with the poster in the threads on the offensiveness of the phrase.
Is it considered insulting in general to refer to women as "a female", and if so, under which circumstances is it so?
Additionally, would the degree of offensiveness change if the implicit noun was added, making the phrase "a female person"? Would any offensive implications be changed, if the masculine versions were used instead (e.g. a male or a male person)?