My hair loss started 3.5 years ago as I turned 50. Now I have half my density. Labs show subclinical hypothyroidism, elevated antibodies, a high estradiol to progesterone ratio of 170 to 0.2, and free testosterone high at 5.6. Zinc level (AP) always low. My doctor blames all symptoms, including hair loss, weight gain, loss of skin elasticity and muscle tone, etc. on menopause. She suggests HRT.
Your doctor is probably correct; your hair loss is related to the appearance of menopause. The estrogen you made had protected you from your genetics, but, now with a lower estrogen, your genetics can be expressing itself. As for Hormone Replacement Therapy, I don’t believe it works for this condition.
We have been performing Scalp Micropigmentation as a cosmetic treatment for the visual effects of thinning hair with great success. Here are some examples of women we have treated: https://scalpmicropigmentation.com/smp-for-women/