The hormone nobody mentions: testosterone

Women produce testosterone too, from both the ovaries and adrenal glands, and it plays a real role in sexual desire. As you age through the menopause transition, testosterone declines steadily alongside estrogen, and that decline becomes more abrupt specifically after surgical menopause, when the ovaries are removed suddenly rather than gradually winding down. Testosterone levels reach their lowest point around age 60, which lines up with when sexual dysfunction rates are highest.

Why this is a separate story from vaginal dryness

Estrogen decline changes the physical tissue, GSM, covered in the piece linked above. Testosterone decline changes something different: the actual wanting, the psychological and neurological drive toward sex in the first place. A woman can have well-managed vaginal comfort and still experience genuinely low desire, or the reverse, because these are two separate hormonal systems doing two separate jobs. Treating one does not automatically treat the other.

What the clinical evidence actually shows

A landmark randomized controlled trial found that testosterone therapy improved satisfying sexual events in postmenopausal women with low libido significantly more than placebo (New England Journal of Medicine). Since then, multiple additional randomized, controlled studies in both surgically and naturally postmenopausal women have found consistent improvements in the frequency of sexually satisfying events, desire, arousal, and orgasm with testosterone therapy specifically. A 2025 review summarizing this evidence base confirmed testosterone as the most evidence-backed hormonal option specifically for low desire, distinct from estrogen-focused treatments (Obstetrical & Gynecological Survey, 2025).

Libido is also a mood, not just a hormone level

One detail worth taking seriously: desire is closely tied to overall mood and energy. Fatigue and low mood have a real, documented dampening effect on sexual desire, independent of hormone levels. This means a full picture of low libido in menopause usually needs to look at sleep, stress, and mood together with hormones, not hormones in isolation. If poor sleep is part of your picture, that has its own mechanism worth understanding: Why Poor Sleep Wrecks Your Weight in Menopause touches the same fatigue-and-hormone territory from a different angle.

What this means practically

  • Low libido is not a personal failure or a sign something is wrong with your relationship by default. It has a real, documented hormonal mechanism that is separate from psychological factors, even though both can be at play together.
  • If vaginal comfort is fine but desire itself is the issue, that points toward testosterone, not estrogen, as the more relevant conversation to have with your doctor.
  • Addressing sleep and mood alongside hormones matters, since desire is genuinely affected by both, not hormones alone.

My Perspective

Estrogen dominates every menopause conversation, understandably, since it drives hot flashes and so many other visible symptoms. But testosterone's role in desire gets almost no airtime, and I think that silence leaves a lot of women assuming low libido is just something to accept, rather than something with a real, researched, and treatable mechanism behind it.

A note from Marilyn: This is education, not medical advice or a diagnosis. Evaluating and treating low libido, including whether testosterone therapy is appropriate, belongs with your own healthcare provider. I am a nutrition specialist, not your physician.

The fuller picture of how hormones beyond estrogen shape midlife is in Estrogen Left the Chat: Biohacking Menopause. If you want to explore whether testosterone therapy specifically might be worth discussing, that decision is covered here: Should You Try Testosterone Therapy for Low Libido in Menopause? And Receipts can help you track how desire, sleep, and mood move together over time.

Frequently asked questions

Does testosterone really affect libido in women, not just men?

Yes. Women produce testosterone from the ovaries and adrenal glands, and it plays a documented role in sexual desire. Multiple randomized controlled trials have found testosterone therapy improves desire, arousal, and satisfying sexual events in postmenopausal women with low libido.

Is low libido in menopause the same as vaginal dryness?

No, they are separate mechanisms. Vaginal dryness comes from estrogen's effect on tissue (GSM). Low libido is more closely tied to testosterone's effect on desire itself, which is why a woman can have one issue without the other.

Why does testosterone decline more after surgical menopause?

When the ovaries are surgically removed, testosterone production drops abruptly rather than gradually declining the way it does through natural menopause, which is why surgically menopausal women often experience a more sudden change in desire.

Can poor sleep or stress cause low libido even if hormones are normal?

Yes. Desire is closely tied to mood and energy, and fatigue or low mood have a real, independent dampening effect on sexual desire, separate from hormone levels. A full picture usually needs to consider both together.