GH1 and hyperinsulinemic hypoglycemia, familial, 4: The onset of these corticotropin (see above), gonadotropin, thyreotropin, somatotropin deficiencies is very insidious and is often revealed by non-specific asthenia, paleness, hair thinning, a loss of libido and (in menstruating women) oligo- or a-menorrhoea.