Low Libido in Women: The Hormonal Causes Most Doctors Do Not Test For

It starts gradually. You are tired more often. Intimacy feels like another item on an already overwhelming to-do list. You do not feel broken exactly. Just switched off.

Low libido in women is one of the most common yet least discussed health concerns. When women do bring it up, they are often told it is "just stress" or "normal after kids" or "part of aging."

These dismissals are incomplete.

Low desire is frequently a hormonal signal from your [Reproductive System →], and the underlying driver is often not what you might expect. The root cause may not originate in your ovaries. It may trace back to how chronic stress is affecting your hormone production.

Your body manufactures many of its hormones through shared pathways. Cortisol (your primary stress hormone), DHEA, estrogen, and testosterone all depend on overlapping precursor molecules and regulatory signals.

Women need testosterone too. In smaller amounts than men, but testosterone drives desire, motivation, energy, and confidence in women just as it does in men.

Here is where chronic stress disrupts the system.

When your [Endocrine System →] is under sustained stress, your body prioritizes cortisol production. Cortisol is your survival hormone. From an evolutionary standpoint, your body will always prioritize survival over reproduction.

Under chronic stress, your hypothalamic-pituitary-adrenal (HPA) axis stays activated, which can suppress the hypothalamic-pituitary-gonadal (HPG) axis, the system that regulates sex hormone production. The result: cortisol stays elevated while testosterone and DHEA output can decline.

You may have seen this described as "pregnenolone steal" in popular health content. The idea is that your body literally steals the raw material (pregnenolone) from sex hormone production to make more cortisol. This is an oversimplification. Hormone regulation involves multiple pathways, enzymes, and feedback loops, not a simple diversion of one molecule. But the broader point, that chronic HPA axis activation suppresses reproductive hormone output, is well-documented in endocrinology research.

The practical reality: cortisol goes up, testosterone and DHEA can go down, and desire diminishes. Not because something is psychologically wrong with you, but because your body is biochemically deprioritizing sex drive under perceived ongoing stress.

Before focusing entirely on the hormonal angle, it is important to acknowledge that low libido in women is almost always multifactorial. Hormones are one piece. Other significant contributors include:

• Relationship dynamics and emotional connection: desire is deeply tied to emotional safety and relationship quality

• Mental health: depression, anxiety, and trauma history all directly affect desire

• Medication side effects: SSRIs, hormonal birth control, blood pressure medications, and others commonly reduce libido

• Sleep quality: exhaustion is one of the most common libido suppressors

• Pain during intercourse: which can be caused by hormonal changes, pelvic floor issues, or other conditions

• Body image and self-confidence

If your libido change coincides with life stress, fatigue, and other hormonal symptoms (irregular periods, temperature changes, mood shifts), the hormonal pathway is worth investigating. But if it coincides with relationship strain, a new medication, or worsening mental health, those factors deserve equal or greater attention.

Even without chronic stress, the transition into perimenopause shifts the hormonal landscape significantly:

• Estrogen drops: can cause vaginal dryness and discomfort that makes intimacy physically unpleasant

• Testosterone drops: reduces the neurological drive for desire

• Progesterone drops: contributes to anxiety and poor sleep, which further suppress libido

These changes can begin in your early 40s, sometimes even late 30s. We cover the broader cognitive and hormonal effects of this transition in our [menopause brain fog article →].

If your libido change coincides with irregular periods, sleep disruption, mood changes, or brain fog, perimenopause is a likely contributing factor and worth discussing with your doctor.

A double-blind, placebo-controlled study published in Menopause (Brooks et al., 2008) found that maca supplementation in postmenopausal women significantly improved measures of sexual dysfunction including desire, arousal, and satisfaction scores compared to placebo.

A systematic review in BMC Complementary and Alternative Medicine (Shin et al., 2010) concluded that there is "limited but suggestive evidence" that maca improves sexual desire, with the strongest results in postmenopausal women and those experiencing antidepressant-related sexual dysfunction.

Honest assessment: the word "suggestive" in that systematic review is important. The studies are promising but small. Maca is not a proven libido treatment in the way that, say, hormone replacement therapy is. It is a reasonable low-risk option to try, especially given its strong safety profile. But "may help some women" is more accurate than "restores libido."

• Variety: black maca is specifically studied for sexual function, while red maca shows more benefit for bone density and mood

• Dosage: 1,500 to 3,000 mg daily

• Form: gelatinized powder absorbs better than raw (gelatinization removes starch and concentrates active compounds)

• Timeline: most studies measure results at 6 to 12 weeks

• Safety: well-tolerated in studies. However, if you have a hormone-sensitive condition (certain breast cancers, endometriosis, uterine fibroids), consult your doctor before using maca, as its effects on hormonal signaling are not fully understood in these contexts

We reviewed maca supplements in our [maca supplements comparison →].

Testosterone and DHEA production depend on adequate sleep, particularly deeper sleep stages. Consistently sleeping fewer than 7 hours can reduce both hormones measurably. Sleep is not optional for hormonal health.

Lifting weights supports a testosterone response in women just as it does in men. Even two sessions per week can positively influence free testosterone levels. This is not about getting bulky. It is about sending your body the signal that you need strength and vitality.

Low libido is common and often responds to lifestyle and nutritional changes. However, seek medical evaluation if you experience:

• Sudden loss of desire that does not correlate with life circumstances

• Low libido combined with irregular periods, hot flashes, or vaginal dryness (may indicate perimenopause or hormonal imbalance)

• Loss of desire after starting a new medication

• Low desire combined with persistent fatigue, weight changes, or cold intolerance (may indicate [thyroid dysfunction →])

• Pain during intercourse that discourages intimacy

• Emotional distress about the change in your desire

A doctor can run hormone panels including estradiol, testosterone, DHEA-S, cortisol, and thyroid markers. These tests are not part of routine bloodwork, which is why many women with hormonally-driven low libido go undiagnosed.

Ask specifically for these tests. If your doctor dismisses your concerns, seek a second opinion from an endocrinologist or a provider experienced in women's hormonal health.

• Low libido is not a character flaw: it is often a hormonal signal that your body is deprioritizing reproductive function under chronic stress

• Chronic stress suppresses sex hormones: sustained HPA axis activation can reduce testosterone and DHEA output through well-documented endocrine pathways

• Women need testosterone too: it drives desire, motivation, and confidence in women just as in men

• It is rarely just hormones: relationship dynamics, mental health, medications, sleep, and pain all significantly influence desire

• Maca shows suggestive evidence: small studies show improvement in desire, particularly in postmenopausal women. Promising but not proven

• Perimenopause matters: hormonal shifts starting in the late 30s or 40s can directly reduce desire through estrogen, testosterone, and progesterone changes

• Test your hormones: ask for estradiol, testosterone, DHEA-S, cortisol, and thyroid panels, which are not part of standard bloodwork

if your libido has declined and you cannot explain it by relationship factors, medication, or mental health alone, your hormones are worth investigating. The chronic stress pathway (cortisol suppressing sex hormone production) is a real and well-documented mechanism. Maca is a reasonable, low-risk option to try for 6 to 12 weeks. But the most important step is getting the right blood tests, specifically fasting cortisol, testosterone, DHEA-S, and thyroid markers, so you know what you are actually dealing with rather than guessing. And if the answer turns out to be partly hormonal and partly everything else, that is normal. Low libido is almost never one thing.