I am not a health professional. I can only relate my own experience.
Full on menopause at 39. I began bhrt at 76. Estradiol and testosterone pellet, progesterone capsules and estradiol vaginal cream. Within hours I felt a strong surge of sexual sensation and voila....my libido was back. I attribute this primarily to the testosterone but certainly it also had to do with the estradiol. Best thing I have done for myself in decades. If only I had known and if my physician had not been in the thrall of the women's health initiative study. So many other benefits too.