"Bring forth men children only"- Give here the context and comment on the line.

This line is quoted from Act1Sc7 of Macbeth, a fine tragedy by the greatest playwright, William Shakespeare.

        Lady Macbeth wants to murder Duncan and she tells Macbeth that Duncan's two two guards besides being fed heavily, will be provided with so much wine that they will loose their consciousness in their celebration and will fall in deep sleep forgetting their duty. This will make the opportunity for Macbeth to kill the unguarded king, thereupon shifting the guilt upon these senseless guards who will be baffle victims of entire heinous incident. Macbeth is compelled to tell her to give birth to only male child her strong and brutal resolution.

      Macbeth means to say that in her strong and cruel disposition she seems to loose her femine qualities, that is why, she can only give birth to male child. Macbeth's poetical imagination is very much genuine. And Lady Macbeth's strong personality and active mind are well-revealed here.