Low Libido in Women

Causes of Low Libido in Women

A lack of sexual desire (low libido) in women can be caused by a variety of physical, hormonal, psychological, and social factors. These causes often occur in combination and require individualized diagnostics and treatment.

Hormonal Causes

Hormones play a key role in regulating libido. An imbalance can lead to decreased sexual desire:

Estrogen Deficiency:
- Particularly during menopause or after removal of the ovaries (oophorectomy).
- Leads to vaginal dryness and pain during intercourse, reducing libido.
Androgen Deficiency:
- Testosterone, which also plays a role in women, decreases with age. Low testosterone levels can cause loss of libido.
- Causes: Aging, stress, use of oral contraceptives, or adrenal insufficiency.
Increased Prolactin:
- Elevated prolactin levels (e.g., due to pituitary tumors or breastfeeding) can reduce libido.
Thyroid Disorders:
- Hypothyroidism (underactive thyroid) leads to fatigue, lack of motivation, and reduced libido.

Psychological Causes

Emotional and psychological factors are frequent causes of low libido:

Stress and Fatigue:
- Chronic stress, overwork, and lack of sleep lead to exhaustion and reduced desire.
Depression and Anxiety Disorders:
- These conditions lower sexual interest and pleasure during intercourse.
- Antidepressants like SSRIs can further reduce libido.
Relationship Issues:
- Conflicts, lack of communication, or emotional intimacy in a relationship impair sexual desire.
Traumatic Experiences:
- Past trauma, sexual abuse, or negative sexual experiences can block libido.

Medication-Related Causes

Several medications can affect libido:

Antidepressants (e.g., SSRIs like fluoxetine, citalopram)
Oral Contraceptives (birth control pills): Reduce androgen levels and sexual desire.
Antihypertensives (blood pressure medications)
Antiepileptics and sedatives
Opioids and chronic pain medications

Physical Causes

Chronic Illnesses:
- Diabetes mellitus, cardiovascular diseases, kidney disorders, and multiple sclerosis can reduce libido.
Pain During Intercourse:
- Dyspareunia (vaginal dryness, endometriosis, inflammatory conditions).
Vaginal Changes:
- After menopause (atrophic vaginitis) or childbirth.
Neurological Disorders:
- Nerve damage or conditions like Parkinson’s disease impair sexual function.

Lifestyle Factors

Excessive Alcohol Consumption and Drug Abuse
Nicotine: Smoking affects circulation and hormone production.
Lack of Physical Activity: Exercise positively influences hormone balance and mental well-being.
Overweight: Can cause hormonal imbalances and reduce self-confidence.

Social and Cultural Factors

Negative attitudes toward sexuality due to cultural or religious influences
Social isolation or lack of emotional closeness

Diagnosis and Treatment

To identify the causes of low libido, a comprehensive examination should be performed:

Hormonal Tests: Estradiol, testosterone, TSH, prolactin
Psychological Evaluation: Depression, anxiety, trauma
Medical Diagnostics: Assessment of underlying conditions and medication use

Treatment depends on the underlying cause and may include:

Hormone Therapy: Testosterone or estrogen replacement therapy
Psychotherapy: Cognitive behavioral therapy, sex therapy
Medication Adjustments: Alternatives to libido-suppressing drugs
Lifestyle Changes: Exercise, stress reduction, healthy diet

Conclusion: Low libido in women is a complex interplay of hormonal, psychological, and physical factors. Individualized diagnostics and treatment, in collaboration with specialists, can help restore sexual well-being.

Hormone Therapy

Hormonal Therapy Options for Low Libido in Women

Low libido in women can have hormonal causes, especially during peri- or postmenopause, after hormonal contraception, or in certain endocrine disorders.
Therapies with DHEA-S, testosterone, or estradiol depend strongly on the individual situation (age, hormone status, cause, comorbidities).

1. Estradiol (Estrogen)

Indication: Estrogen deficiency (e.g., in menopause) with symptoms like vaginal dryness, dyspareunia, hot flashes.
Effect on libido: Mainly indirect – improves vaginal blood flow, elasticity, moisture → intercourse becomes more comfortable, which can secondarily improve libido.
Forms:
- Local (vaginal cream, suppositories, ring) → works mainly against dryness.
- Systemic (patch, gel, tablet) → relieves menopausal symptoms, libido effect often limited.
Often combined with a progestogen in women with an intact uterus (endometrial protection).

2. Testosterone

Indication: HSDD (Hypoactive Sexual Desire Disorder) in postmenopausal women after exclusion of other causes.
Effect: Direct increase in sexual desire, fantasies, arousal.
Forms: Transdermal gels or patches (mostly off-label in many countries, including Germany, as no female-specific products are approved).
Target dose: Low – to achieve physiological female testosterone levels (much lower than in men).
Risks/side effects: Acne, increased body hair, deepened voice (rare, usually with overdosing), lipid profile changes.
Monitoring: Testosterone levels, lipid profile, clinical check-ups.

3. DHEA (Dehydroepiandrosterone / DHEA-S)

Physiology: Precursor of androgens and estrogens; production declines with age.
Indication: In some countries approved for postmenopausal libido loss or vaginal atrophy.
Forms:
- Systemic (tablets) → mild effect, mixed study results.
- Intravaginal (prasterone) → improves lubrication, reduces pain, may have positive libido effects.
Risks: Possible androgenic side effects with systemic use.

4. Combination Therapy

Often estrogen for mucosal health combined with testosterone for desire.
Vaginal DHEA can be added for local symptoms.

Key principles:

Clarify causes first – libido loss can be due to psychological, relational, medication-related, or systemic reasons.
Off-label considerations – testosterone therapy for women is often off-label and should be managed by experienced clinicians with monitoring.
Regular follow-up – hormone levels, clinical side effects, blood pressure, lipid profile.
Stop treatment if side effects occur or no benefit is seen after 3–6 months.

Comparison Table: Estradiol, Testosterone, DHEA

Hormone	Main goal / effect on libido	Typical application	Evidence for libido improvement	Risks / side effects	Notes
Estradiol (Estrogen)	Indirect improvement by treating vaginal atrophy, dryness, pain	Local (vaginal cream/suppository/ring) or systemic (gel, patch, tablet)	Mostly indirect: increases comfort during sex, which can improve desire	Breast tenderness, fluid retention, thrombosis risk (systemic), endometrial growth (with unopposed use)	Always combine with progestogen if uterus is intact; local therapy has minimal systemic risks
Testosterone	Directly increases sexual desire, fantasies, arousal	Transdermal (gel, patch) – very low doses	Well supported for postmenopausal HSDD	Acne, excess hair, deepened voice (rare), lipid changes, mood changes	Mostly off-label in EU; target is physiological female levels; requires monitoring
DHEA (Dehydroepiandrosterone)	Precursor to androgens/estrogens, may act locally/systemically	Systemic (tablet) or local intravaginal (prasterone)	Mixed evidence; vaginal form improves lubrication and may boost libido	Mild androgenic effects (acne, hair growth), rare hormone-dependent tumors with long-term use	Vaginal form best for dyspareunia; systemic effect weaker than testosterone

Low Libido in Men

1. Causes of Low Libido in Men

A) Hormonal causes

Testosterone deficiency (hypogonadism)
- Primary (testicular dysfunction, e.g., Klinefelter syndrome, orchitis, radiation)
- Secondary (pituitary or hypothalamic disorders)
- Age-related decline (late-onset hypogonadism)
Thyroid disorders (hypo- or hyperthyroidism)
Hyperprolactinemia (e.g., prolactinoma, medications)
Cushing’s syndrome or adrenal insufficiency

B) Psychological / psychosocial factors

Depression, anxiety disorders
Stress, relationship problems
Traumatic experiences or past sexual dysfunction

C) Medication-related causes

Antidepressants (especially SSRIs, SNRIs)
Beta-blockers, thiazide diuretics
Antiandrogens (e.g., in prostate cancer therapy)
Opioids

D) Lifestyle & physical illnesses

Alcohol or drug abuse
Obesity, metabolic syndrome
Chronic illnesses (diabetes, cardiovascular disease, chronic kidney or liver disease)
Sleep disorders, obstructive sleep apnea

2. Diagnostics

History: Libido, erectile function, orgasm, psychosocial factors, full medication list
Physical examination
Laboratory tests (morning, fasting):
- Total testosterone ± free testosterone
- SHBG
- LH, FSH
- Prolactin
- TSH, free T4
- Possibly cortisol, HbA1c, lipid profile
Additional tests: Sleep study (if sleep apnea suspected), psychological evaluation

Treatment

Treatment Options

A) Treating the underlying condition

Optimize thyroid function
Treat depression / anxiety disorders (possibly adjust psychotropic medication)
Tumor treatment (e.g., prolactinoma with dopamine agonists such as cabergoline)

B) Hormonal therapy

Testosterone replacement therapy for confirmed hypogonadism with symptoms
- Forms: gel, patch, intramuscular injections (short- or long-acting)
- Goal: physiological levels (avoid overdosing)
- Monitoring: hemoglobin/hematocrit, PSA, liver values, lipid profile, testosterone levels
- Contraindications: prostate cancer, breast cancer, severe heart failure, polycythemia
Treatment of hyperprolactinemia: dopamine agonists
Levothyroxine for hypothyroidism

C) Psychosexual therapy

Sex therapy / couples therapy
Stress management
Cognitive behavioral therapy for psychogenic causes

D) Lifestyle modifications

Weight reduction
Regular physical activity (can slightly increase testosterone and improve circulation)
Reduce alcohol and nicotine
Ensure sufficient sleep

Prognosis

With reversible causes, full restoration of libido is often possible.
In chronic diseases, treatment can still significantly improve quality of life and sexual function.

Kisspeptin

Kisspeptin is a hormone produced in the hypothalamus that binds to the KISS1 receptor. Initially, it was discovered that stimulation of KISS1 could suppress metastasis in skin cancer and breast cancer.

Studies of loss-of-function mutations have shown that the absence of kisspeptin prevents the onset of puberty. Recent research has demonstrated that administering kisspeptin can significantly increase libido in both men and women. This represents a promising breakthrough for the medical treatment of libido loss, particularly in women.

Kisspeptin is a steroid hormone and has long been used as an anabolic agent by bodybuilders to promote muscle growth.

Kisspeptin plays a significant role in regulating libido and overall reproductive function. It is a key hormone in the hypothalamic regulatory circuit, influencing the control of sex hormones by stimulating the release of gonadotropin-releasing hormone (GnRH). In cases of low libido, impaired kisspeptin function or low kisspeptin levels may be a contributing factor.

Role of Kisspeptin in Low Libido

Regulation of Sex Hormones:
- Kisspeptin binds to the KISS1 receptor and stimulates the release of GnRH from the hypothalamus.
- GnRH activates the pituitary gland to release LH (luteinizing hormone) and FSH (follicle-stimulating hormone), which in turn regulate the production of estrogen and testosterone in the gonads.
- Low kisspeptin levels can therefore lead to reduced production of sex hormones, contributing to decreased libido.
Impact on Libido:
- Beyond hormonal regulation, kisspeptin has direct effects on sexual behavior and sexual motivation. Studies show that administering kisspeptin can increase libido and sexual arousal in both men and women.
- By activating specific brain regions, such as the limbic system associated with desire and emotions, kisspeptin enhances sexual motivation.
Influence on Mood and Emotional Well-being:
- Kisspeptin also affects emotional brain regions and may reduce symptoms of depression or low motivation, which often accompany libido loss.

Clinical Studies on Kisspeptin and Low Libido

Recent research has demonstrated that the administration of kisspeptin in women with low sexual desire leads to a significant increase in libido.
Studies indicate that kisspeptin not only regulates hormone production but also activates brain areas involved in sexual arousal and motivation.

Link Between Kisspeptin and Low Libido

Disrupted kisspeptin metabolism or low kisspeptin levels can result in:

Low testosterone or estrogen → hormonally induced libido loss.
Reduced GnRH release → disruption of the hypothalamic-pituitary-gonadal axis.
Reduced activation of brain regions responsible for sexual desire.

Therapeutic Approaches

Given kisspeptin’s role in libido development and hormone regulation, kisspeptin therapy could offer a targeted treatment option for low libido in both women and men. It presents potential benefits such as:

Increasing libido by directly stimulating brain regions.
Hormonal regulation: Raising testosterone or estrogen levels in cases of hormonal deficiency.
Improving emotional well-being, often linked to sexual dysfunction.

Conclusion: Kisspeptin plays a central role in hormonal regulation and libido control. A deficiency or dysfunction in the kisspeptin system can lead to libido loss. Early studies show promising results for kisspeptin administration, which may offer an innovative approach to treating low libido in the future.