hair loss

A 45-year-old woman presents to the clinic with a 6-month history of fatigue, weight gain, and feeling cold all the time. She also reports hair loss and constipation. On examination, her skin is dry, and her reflexes are delayed. Her blood pressure is 110/70 mmHg, and her heart rate is 60 bpm. Laboratory tests reveal a low free T4 and elevated TSH. What is the most likely diagnosis?

A 32-year-old woman presents to her general practitioner with a 2-month history of fatigue, weight gain, and feeling cold all the time. She also reports hair loss and constipation. On examination, her heart rate is 58 bpm, and she has dry skin and a delayed relaxation phase of the deep tendon reflexes. Her thyroid function tests reveal a high TSH level and low free T4. She has no significant past medical history and is not on any medications. Which of the following is the most appropriate initial management for her condition?

29-year-old lady with postpartum hair loss, sparse hair, positive pull test, and normal scalp. Diagnosis?