Yes, this is Turner's syndrome. This girl may have been brought in by her parents for an evaluation of primary ammenorrhea and she doesn't seem to have pubic or axillary hair. Should it have been a surprise, if she had some pubic or axillary hair ? Ans No Because, part of the stimulus ( read - hormones ) comes from the adrenal gland ( coinciding with the development of the zona reticularis ), technically called - 'Adrenarche' and it's independent of the pituitary - ovarian axis. She will have the onset of adrenarche sooner or later and will have some pubic and axillary hair, albeit a little less. I know that she has bigger problems on her hand, but I mentioned it becos, it's often a confounding factor thrown into many mcqs on "Intersexuality" ref - http://en.wikipedia.org/wiki/Adrenarche
