A 29-year-old woman complains of a general weakness, increased fatigability. weight loss, and infrequent scanty periods. One year ago she had a childbirth. complicated with a massive bleeding. Objectively, the woman is asthenic, her skin is pale and dry, the hair cover is thin on her scalp and absent in her armpits. Her mammary glands and genitals are hypotrophic. Make the provisional diagnosis: