<prompt> Rapid, diffuse, excessive hair loss after 3 months of pregnancy is due to?Androgenic alopeciaTelogen effluviumAnagen effluviumAlopecia areata  <response>: ANSWER: B Telogen effluviumREF: Harrisons 17th edition table 54.5Telogen effluviumDiffuse shedding of normal hairs following either major stress high fever, severe infection or change in hormones post-partumStress causes the normally asynchronous growth cycles of individual hairs to become synchronous; therefore, large numbers of growing anagen hairs simultaneously enter the dying telogen phase Observation; discontinue any drugs that have alopecia as a side effect; must exclude underlying metabolic causes, e.g., hypothyroidism, hyperthyroidismEtiologyFever of any cause, prolonged , high , recurrentChild birthAbortion and cessation of OCPOperations and blood lossPsychiatric disturbance or acute mental illnessCrash dieting or nutritional def.Hypothyroidism , hyperthyroidismTreatmentAnticoagulants, antihypertensive, lithium or oral retinoid.Reversible without treatment 