Effective treatment for anorgasmia depends on the cause. In the case of women suffering from psychological sexual trauma or inhibition, psychosexual counselling might be advisable and could be obtained through general practitioner (GP) referral.

Women suffering from anorgasmia with no obvious psychological cause would need to be examined by their GP to check for absence of disease. Blood tests would also need to be done (full blood count, liver function, oestradiol/estradiol, total testosterone, SHBG, FSH/LH, prolactin, thyroid function, lipids and fasting blood sugar) to check for other conditions such as diabetes, lack of ovulation, low thyroid function or hormone imbalances. The normal thresholds for these tests and timing in a woman's menstrual cycle is detailed in Berman et al., 2005.

They would then need to be referred to a specialist in sexual medicine. The specialist would check the patient's blood results for hormonal levels, thyroid function and diabetes, evaluate genital blood flow and genital sensation, as well as giving a neurological work-up to determine the degree (if any) of nerve damage.

Recently, it has been proposed to add a subtype of FOD, called reduced orgasmic intensity, and field trials are underway to assess the suitability of this proposal.

When deciding the appropriate treatment, it is important for the physician to distinguish PE as a "complaint" versus PE as a "syndrome". About 20 years ago, PE was classified into "lifelong PE" and "acquired PE". Recently, a new classification of PE was proposed based on controlled clinical and epidemiological stopwatch studies, and it included 2 other PE syndromes: "natural variable PE" and "premature-like ejaculatory dysfunction". Only individuals with lifelong PE with IELT shorter than 1–1.5 minutes should require medication as a first option, along with or without therapy. For those who fall into one of the other categories, treatment should consist of patient reassurance, behavior therapy, and/or psychoeducation to explain that irregular early ejaculation is a normal variation.

Several possible sub-classifications have been discussed, but none is in universal usage. "Primary premature ejaculation" refers to lifelong experience of the problem (since puberty), and "secondary premature ejaculation" reference to the problem beginning later in life. It has also been subdivided into "global premature ejaculation", when it occurs with all partners and contexts, and "situational premature ejaculation," when it occurs in some situations or with specific partners.

A physical exam of the genitals is applied to ensure that there are no anatomical problems. The urine will be examined for the presence of semen. If there are no sperm in the urine, it may be due to damage to the prostate as a result of surgery or prior radiation therapy.

Meditation has demonstrated effectiveness in case studies.

There is yet no reliable medication for delayed ejaculation. PDE5 inhibitors such as Viagra have little effect. In fact, Viagra has a delaying effect on ejaculation, possibly through additional effect in the brain or decrease of sensitivity in the head of the penis.

Diagnosis is usually by way of a urinalysis performed on a urine specimen that is obtained shortly after ejaculation. In cases of retrograde ejaculation, the specimen will contain an abnormal level of sperm.

Especially in case of "orgasmic anejaculation", anejaculation can often be confused with retrograde ejaculation, and they share some fundamental aspects of the cause. Urinalysis is used to distinguish between them.

Therapy usually involves homework assignments and exercises intended to help a man get used to having orgasms through insertional intercourse, vaginal, anal, or oral, that is through the way to which he is not accustomed. Commonly, the couple is advised to go through three stages. At the first stage, a man masturbates in the presence of his partner. Sometimes, this is not an easy matter as a man may be used to having orgasms alone. After a man learns to ejaculate in the presence of his partner, the man's hand is replaced with the hand of his partner. In the final stage, the receptive partner inserts the insertive partner's penis into the partner's vagina, anus, or mouth as soon as the ejaculation is felt to be imminent. Thus, a man gradually learns to ejaculate inside the desired orifice by an incremental process.

Several techniques have been developed and applied by sex therapists, including Kegel exercises (to strengthen the muscles of the pelvic floor) and Masters and Johnson's "stop-start technique" (to desensitize the man's responses) and "squeeze technique" (to reduce excessive arousal).

To treat premature ejaculation, Masters and Johnson developed the "squeeze technique", based on the Semans technique developed by Dr. James Semans in 1956. Men were instructed to pay close attention to their arousal pattern and learn to recognize how they felt shortly before their "point of no return", the moment ejaculation felt imminent and inevitable. Sensing it, they were to signal their partner, who squeezed the head of the penis between thumb and index finger, suppressing the ejaculatory reflex and allowing the man to last longer.

The squeeze technique worked, but many couples found it cumbersome. From the 1970s to the 1990s, sex therapists refined the Masters and Johnson approach, largely abandoning the squeeze technique and focused on a simpler and more effective technique called the "stop-start" technique. During intercourse, as the man senses he is approaching climax, both partners stop moving and remain still until the man's feelings of ejaculatory inevitability subside, at which point, they are free to resume active intercourse. To help the man increase awareness of his sexual experience, he is encouraged to create an excitement scale of 1-100. Successful completion of this scale will include paying attention to his heart rate, when (and if) he squeezes his inner thighs, and sensations in all parts of his body. By creating this scale, he will be more able to pace himself as he uses the "stop-start" technique.

In addition to the stop-start technique, other sexual adjustments help men develop and maintain ejaculatory control, among them: focus exercises, mind/body coordination exercises, masturbation exercises, deep breathing, and whole-body massage.

Sex therapists estimate that the refined last-longer program teaches effective ejaculatory control to 90 percent of men. The authors of one study concluded that sex therapy "has a remarkable therapeutic effect on premature ejaculation".

Several decades ago the medical community believed the majority of sexual dysfunction cases were related to psychological issues. Although this may be true for a portion of men, the vast majority of cases have now been identified as having a physical cause or correlation. If the sexual dysfunction is deemed to have a psychological component or cause, psychotherapy can help. Situational anxiety arises from an earlier bad incident or lack of experience. This anxiety often leads to development of fear towards sexual activity and avoidance. In return evading leads to a cycle of increased anxiety and desensitization of the penis. In some cases, erectile dysfunction may be due to marital disharmony. Marriage counseling sessions are recommended in this situation.

Lifestyle changes such as discontinuing smoking, drug or alcohol abuse can also help in some types of erectile dysfunction.

Several oral medications like Viagra, Cialis and Levitra have become available to help people with erectile dysfunction and have become first line therapy. These medications provide an easy, safe, and effective treatment solution for approximately 60% of men. In the rest, the medications may not work because of wrong diagnosis or chronic history.

Another type of medication that is effective in roughly 85% of men is called intracavernous pharmacotherapy and involves injecting a vasodilator drug directly into the penis in order to stimulate an erection. This method has an increased risk of priapism if used in conjunction with other treatments, and localized pain.

When conservative therapies fail, are an unsatisfactory treatment option, or are contraindicated for use, the insertion of a penile prosthesis, or penile implant, may be selected by the patient. Technological advances have made the insertion of a penile prosthesis a safe option for the treatment of erectile dysfunction which provides the highest patient and partner satisfaction rates of all available ED treatment options.

Pelvic floor physical therapy has been shown to be a valid treatment for men with sexual problems and pelvic pain.

Just as with erectile dysfunction in men, lack of sexual function in women may be treated with hormonal patches or tablets to correct hormonal imbalances, clitoral vacuum pump devices and medication to improve blood flow, sexual sensation and arousal.

Many practitioners today treat both men and women who have SSRI-induced anorgasmia with sildenafil, more commonly known as Viagra. While this approach is known to work well in men with sexual dysfunction, it is only recently that the effectiveness of sildenafil in women with sexual dysfunction is coming to light. A recent study by H. G. Nurnberg et al. showed a complete or very significant reversal of their sexual dysfunction upon taking sildenafil one hour prior to sexual activity. In this study, eight out of the nine women required 50 mg of sildenafil while the 9th woman required 100 mg of sildenafil.

Another option for women who have SSRI-induced anorgasmia is the use of vardenafil. Vardenafil is a type 5 phosphodiesterase (PDE5) inhibitor that facilitates muscle relaxation and improves penile erection in men. However, there is much controversy about the efficiency of the drug used in the reversal of female sexual dysfunction. Vardenafil is similar to sildenafil, but vardenafil is less expensive and may be covered under some insurance plans. A study by A.K. Ashton M.D. has shown that in the case of one particular woman, the effects of vardenafil as opposed to sildenafil have not only been comparable in the effectiveness, but that vardenafil is cheaper and reversal of sexual dysfunction requires a smaller dose. So far, vardenafil has been approved by the Food and Drug administration only for use in men.

The NIH states that yohimbine hydrochloride has been shown in human studies to be possibly effective in the treatment of male impotence resulting from erectile dysfunction or SSRI usage (e.g., anorgasmia). Published reports have shown it to be effective in the treatment of orgasmic dysfunction in men.

Cabergoline, an agonist of dopamine D₂ receptors which inhibits prolactin production, was found in a small study to fully restore orgasm in one third of anorgasmic subjects, and partially restore orgasm in another third. Limited data has shown that the drug amantadine may help to relieve SSRI-induced sexual dysfunction. Cyproheptadine, buspirone, stimulants such as amphetamines (including the antidepressant bupropion), nefazodone and yohimbine have been used to treat SSRI-induced anorgasmia. Reducing the SSRI dosage may also resolve anorgasmia problems.

Estrogens are responsible for the maintenance of collagen, elastic fibers, and vasoculature of the urogenital tract, all of which are important in maintaining vaginal structure and functional integrity; they are also important for maintaining vaginal pH and moisture levels, both of which aid in keeping the tissues lubricated and protected. Prolonged estrogen deficiency leads to atrophy, fibrosis, and reduced blood flow to the urogenital tract, which is what causes menopausal symptoms such as vaginal dryness and pain related to sexual activity and/or intercourse. It has been consistently demonstrated that women with lower sexual functioning have lower estradiol levels.

Androgen therapy for hypoactive sexual desire disorder (HSDD) has a small benefit but its safety is not known. It is not approved as a treatment in the United States. If used it is more common among women who have had an oophorectomy or who are in a postmenopausal state. However, like most treatments, this is also controversial. One study found that after a 24-week trial, those women taking androgens had higher scores of sexual desire compared to a placebo group. As with all pharmacological drugs, there are side effects in using androgens, which include hirutism, acne, ploycythaemia, increased high-density lipoproteins, cardiovascular risks, and endometrial hyperplasia is a possibility in women without hysterectomy. Alternative treatments include topical estrogen creams and gels can be applied to the vulva or vagina area to treat vaginal dryness and atrophy.

The first-line method for sperm retrieval in men with spinal cord injury is "penile vibratory stimulation" (PVS). The penile vibratory stimulator is a plier-like device that is placed around glans penis to stimulate it by vibration. In case of failure with PVS, spermatozoa are sometimes collected by electroejaculation, or surgically by per cutaneous epididymal sperm aspiration (PESA) or testicular sperm extraction (TESE).

Without medical intervention, the male fertility rate after SCI is 5–14%, but the rate increases with treatments. Even with all available medical interventions, fewer than half of men with SCI can father children. Assisted insemination is usually required. As with erection, therapies used to treat infertility in uninjured men are used for those with SCI.

For anejaculation in SCI, the first-line method for sperm retrieval is penile vibratory stimulation (PVS). A high-speed vibrator is applied to the glans penis to trigger a reflex that causes ejaculation, usually within a few minutes. Reports of efficacy with PVS range from 15–88%, possibly due to differences in vibrator settings and experience of clinicians, as well as level and completeness of injury. Complete lesions strictly above Onuf's nucleus (S2–S4) are responsive to PVS in 98%, but complete lesions of the S2–S4 segments are not.

In case of failure with PVS, spermatozoa are sometimes collected by electroejaculation: an electrical probe is inserted into the rectum, where it triggers ejaculation. The success rate is 80–100%, but the technique requires anaesthesia and does not have the potential to be done at home that PVS has. Both PVS and electroejaculation carry a risk of autonomic dysreflexia, so drugs to prevent the condition can be given in advance and blood pressure is monitored throughout the procedures for those who are susceptible. Massage of the prostate gland and seminal vesicles is another method to retrieve stored sperm. If these methods fail to cause ejaculation or do not yield sufficient usable sperm, sperm can be surgically removed by testicular sperm extraction or percutaneous epididymal sperm aspiration. These procedures yield sperm in 86–100% of cases, but nonsurgical treatments are preferred.

Premature or spontaneous ejaculation is treated with antidepressants including selective serotonin reuptake inhibitors, which are known to delay ejaculation as a side effect.

Compared with the options available for treating sexual dysfunction in men (for whom results are concretely observable), those available for women are limited. For example, PDE5 inhibitors, oral medications for treating erectile dysfunction in men, have been tested for their ability to increase sexual responses such as arousal and orgasm in women—but no controlled trials have been done in women with SCI, and trials in other women yielded only inconclusive results. In theory, women's sexual response could be improved using a vacuum device made to draw blood into the clitoris, but few studies on treatments for sexual function in women with SCI have been carried out. There is a particular paucity of information outside the area of reproduction.

Some strategies suggested or proposed for avoiding male infertility include the following:

- Avoiding smoking as it damages sperm DNA

- Avoiding heavy marijuana and alcohol use.

- Avoiding excessive heat to the testes.

- Maintaining optimal frequency of coital activity: sperm counts can be depressed by daily coital activity and sperm motility may be depressed by coital activity that takes place too infrequently (abstinence 10–14 days or more).

- Wearing a protective cup and jockstrap to protect the testicles, in any sport such as baseball, football, cricket, lacrosse, hockey, softball, paintball, rodeo, motorcross, wrestling, soccer, karate or other martial arts or any sport where a ball, foot, arm, knee or bat can come into contact with the groin.

- Diet: Healthy diets (i.e. the Mediterranean diet) rich in such nutrients as omega-3 fatty acids, some antioxidants and vitamins, and low in saturated fatty acids (SFAs) and trans-fatty acids (TFAs) are inversely associated with low semen quality parameters. In terms of food groups, fish, shellfish and seafood, poultry, cereals, vegetables and fruits, and low-fat dairy products have been positively related to sperm quality. However, diets rich in processed meat, soy foods, potatoes, full-fat dairy products, coffee, alcohol and sugar-sweetened beverages and sweets have been inversely associated with the quality of semen in some studies. The few studies relating male nutrient or food intake and fecundability also suggest that diets rich in red meat, processed meat, tea and caffeine are associated with a lower rate of fecundability. This association is only controversial in the case of alcohol. The potential biological mechanisms linking diet with sperm function and fertility are largely unknown and require further study.

Ultrasonography of the scrotum is useful when there is a suspicion of some particular diseases. It may detect signs of testicular dysgenesis, which is often related to an impaired spermatogenesis and to a higher risk of testicular cancer. Scrotum ultrasonography may also detect testicular lesions suggestive of malignancy. A decreased testicular vascularization is characteristic of testicular torsion, whereas hyperemia is often observed in epididymo-orchitis or in some malignant conditions such as lymphoma and leukemia. Doppler ultrasonography useful in assessing venous reflux in case of a varicocele, when palpation is unreliable or in detecting recurrence or persistence after surgery, although the impact of its detection and surgical correction on sperm parameters and overall fertility is debated.

Dilation of the head or tail of the epididymis is suggestive of obstruction or inflammation of the male reproductive tract. Such abnormalities are associated with abnormalities in sperm parameters, as are abnormalities in the texture of the epididymis. Scrotal and transrectal ultrasonography (TRUS) are useful in detecting uni- or bilateral congenital absence of the vas deferens (CBAVD), which may be associated with abnormalities or agenesis of the epididymis, seminal vesicles or kidneys, and indicate the need for testicular sperm extraction. TRUS plays a key role in assessing azoospermia caused by obstruction, and detecting distal CBAVD or anomalies related to obstruction of the ejaculatory duct, such as abnormalities within the duct itself, a median cyst of the prostate (indicating a need for cyst aspiration), or an impairment of the seminal vesicles to become enlarged or emptied.

It can depend on one or more of several causes, including:

- Sexual inhibition

- Pharmacological inhibition. They include mostly antidepressant and antipsychotic medication, and the patients experiencing that tend to quit them

- Autonomic nervous system

- Prostatectomy - surgical removal of the prostate.

- Ejaculatory duct obstruction

- Spinal cord injury causes sexual dysfunction including anejaculation. The rate of being able to ejaculate varies with the type of lesion, as detailed in the table at right.

- old age

Anejaculation, especially the "orgasmic" variant, is usually indistinguishable from retrograde ejaculation. However, a negative urinalysis measuring no abnormal presence of spermatozoa in the urine will eliminate a retrograde ejaculation diagnosis.

Thus, if the affected man has the sensations and involuntary muscle-contractions of an orgasm but no or very low-volume semen, ejaculatory duct obstruction is another possible underlying pathology of anejaculation.

There is no generally agreed upon diagnostic criteria for POIS. One group has developed five preliminary criteria for diagnosing POIS. These are:

1. one or more of the following symptoms: sensation of a flu-like state, extreme fatigue or exhaustion, weakness of musculature, experiences of feverishness or perspiration, mood disturbances and / or irritability, memory difficulties, concentration problems, incoherent speech, congestion of nose or watery nose, itching eyes;

2. all symptoms occur immediately (e.g., seconds), soon (e.g., minutes), or within a few hours after ejaculation that is initiated by coitus, and / or masturbation, and / or spontaneously (e.g., during sleep);

3. symptoms occur always or nearly always, e.g., in more than 90% of ejaculation events;

4. most of these symptoms last for about 2–7 days; and

5. disappear spontaneously.

POIS is prone to being erroneously ascribed to psychological factors such as hypochondriasis or somatic symptom disorder.

Azoospermia is usually detected in the course of an infertility investigation. It is established on the basis of two semen analysis evaluations done at separate occasions (when the seminal specimen after centrifugation shows no sperm under the microscope) and requires a further work-up.

The investigation includes a history, a physical examination including a thorough evaluation of the scrotum and testes, laboratory tests, and possibly imaging. History includes the general health, sexual health, past fertility, libido, and sexual activity. Past exposure to a number of agents needs to be queried including medical agents like hormone/steroid therapy, antibiotics, 5-ASA inhibitors (sulfasalazine), alpha-blockers, 5 alpha-reductase inhibitors, chemotherapeutic agents, pesticides, recreational drugs (marijuana, excessive alcohol), and heat exposure of the testes. A history of surgical procedures of the genital system needs to be elicited. The family history needs to be assessed to look for genetic abnormalities.

Congenital absence of the vas deferens may be detectable on physical examination and can be confirmed by a transrectal ultrasound (TRUS). If confirmed genetic testing for cystic fibrosis is in order. Transrectal ultrasound can also assess azoospermia caused by obstruction, or anomalies related to obstruction of the ejaculatory duct, such as abnormalities within the duct itself, a median cyst of the prostate (indicating a need for cyst aspiration), or an impairment of the seminal vesicles to become enlarged or emptied.

Retrograde ejaculation is diagnosed by examining a postejaculatory urine for presence of sperm after making it alkaline and centifuging it.

Low levels of LH and FSH with low or normal testosterone levels are indicative of pretesticular problems, while high levels of gonadotropins indicate testicular problems. However, often this distinction is not clear and the differentiation between obstructive versus non-obstructive azoospermia may require a testicular biopsy. On the other hand, "In azoospermic men with a normal ejaculate volume, FSH serum level greater than two times the upper limit of the normal range is reliably diagnostic of dysfunctional spermatogenesis and, when found, a diagnostic testicular biopsy is usually unnecessary, although no consensus exists in this matter." But also, extremely high levels of FSH (>45 ID/mL) have been correlated with successful microdissection testicular sperm extraction.

Serum inhibin-B weakly indicates presence of sperm cells in the testes, raising chances for successfully achieving pregnancy through testicular sperm extraction (TESE), although the association is not very substantial, having a sensitivity of 0.65 (95% confidence interval [CI]: 0.56–0.74) and a specificity of 0.83 (CI: 0.64–0.93) for prediction the presence of sperm in the testes in non-obstructive azoospermia.

Seminal plasma proteins TEX101 and ECM1 were recently proposed for the differential diagnosis of azoospermia forms and subtypes, and for prediction of TESE outcome. Mount Sinai Hospital, Canada started clinical trial to test this hypothesis in 2016.

It is recommended that men primary hypopituitarism may be linked to a genetic cause, a genetic evaluation is indicated in men with azoospermia due to primary hypopituitarism. Azoospermic men with testicular failure are advised to undergo karyotype and Y-micro-deletion testing.

Some drugs such as trazodone may cause priapism as a side effect, in which case discontinuing the medication may give relief. Additionally, the condition can sometimes start only after the discontinuation of SSRIs. In some recorded cases, the syndrome was caused by or can cause a pelvic arterial-venous malformation with arterial branches to the penis or clitoris; surgical treatment was effective in this case.

In other situations where the cause is unknown or less easily treatable, the symptoms can sometimes be reduced by the use of antidepressants, antiandrogenic agents, and anaesthetising gels. Psychotherapy with cognitive reframing of the arousal as a healthy response may also be used.

More recently, the symptoms of the condition have also been linked with pudendal nerve entrapment. Regional nerve blocks and less common surgical intervention have demonstrated varying degrees of success in most cases. There is, however, no evidence for the long-term efficacy of surgical intervention.

In one recent case, serendipitous relief of symptoms was noted from treatment with varenicline, a treatment for nicotine addiction.

Achieving a pregnancy naturally may be a challenge if the male suffers from a low sperm count. However, chances are good if the female partner is fertile; many couples with this problem have been successful. Prognosis is more limited if there is a combination of factors that include sperm dysfunction and reduced ovarian reserve.

Treatment takes place within the context of infertility management and needs also to consider the fecundity of the female partner. Thus the choices can be complex.

In a number of situations direct medical or surgical intervention can improve the sperm concentration, examples are use of FSH in men with pituitary hypogonadism, antibiotics in case of infections, or operative corrections of a hydrocele, varicocele, or vas deferens obstruction.

In most cases of oligospermia including its idiopathic form there is no direct medical or surgical intervention agreed to be effective. Empirically many medical approaches have been tried including clomiphene citrate, tamoxifen, HMG, FSH, HCG, testosterone, Vitamin E, Vitamin C, anti-oxidants, carnitine, acetyl-L-carnitine, zinc, high-protein diets. In a number of pilot studies some positive results have been obtained. Clomiphene citrate has been used with modest success. The combination of tamoxifen plus testosterone was reported to improve the sperm situation.

The use of carnitine showed some promise in a controlled trial in selected cases of male infertility improving sperm quality and further studies are needed.

In many situations, intrauterine inseminations are performed with success. In more severe cases IVF, or IVF - ICSI is done and is often the best option, specifically if time is a factor or fertility problems coexist on the female side.

The Low dose Estrogen Testosterone Combination Therapy may improve sperm count and motility in some men including severe oligospermia.

There is no standard method of treating or managing POIS. Patients need to be thoroughly examined in an attempt to find the causes of their POIS symptoms, which are often difficult to determine, and which vary across patients. Once a cause is hypothesized, an appropriate treatment can be attempted. At times, more than one treatment is attempted, until one that works is found.

Affected individuals typically avoid sexual activity, especially ejaculation, or schedule it for times when they can rest and recover for several days afterwards. In case post-coital tristesse (PCT) is suspected, patients could be treated with selective serotonin reuptake inhibitors.

Another patient, in whom POIS was suspected to be caused by cytokine release, was successfully treated with nonsteroidal anti-inflammatory drugs (NSAIDs) just prior to and for a day or two after ejaculation. The patient took diclofenac 75 mg 1 to 2 hours prior to sexual activity with orgasm, and continued twice daily for 24 to 48 hours.

One POIS patient with erectile dysfunction and premature ejaculation had much lower severity of symptoms on those occasions when he was able to maintain penile erection long enough to achieve vaginal penetration and ejaculate inside his partner. The patient took tadalafil to treat his erectile dysfunction and premature ejaculation. This increased the number of occasions on which he was able to ejaculate inside his partner, and decreased the number of occasions on which he experienced POIS symptoms. This patient is thought to have Dhat syndrome rather than true POIS.

In one patient, the POIS symptoms were so severe, that he decided to undergo castration in order to relieve them. The POIS symptoms were cured by the castration.

Two patients, in whom POIS was suspected to be caused by auto-immune reaction to their own semen, were successfully treated by allergen immunotherapy with their own autologous semen. They were given multiple subcutaneous injections of their own semen for three years. Treatment with autologous semen "might take 3 to 5 years before any clinically relevant symptom reduction would become manifest".

Treatments are not always successful, especially when the cause of POIS in a particular patient has not been determined. In one patient, all of whose routine laboratory tests were normal, the following were attempted, all without success: ibuprofen, 400 mg on demand; tramadol 50 mg one hour pre-coitally; and escitalopram 10 mg daily at bedtime for 3 months.

Low-volume, runny/fluid semen (oligospermia) or no semen at all (dry ejaculation/aspermia) are a logical consequence of an obstruction downstream of the seminal vesicles which contribute most to the volume of the semen. Usually, men will be able to observe a runny/fluid, low-volume semen by themselves during masturbation. Since the seminal vesicles contain a viscous, alkaline fluid rich in fructose, a chemical analysis of the semen of affected men will result in a low concentration of fructose and a low pH. A microscopic semen analysis will reveal aspermia/azoospermia.

In contrast, if both vasa deferentia are obstructed (which may be the result of intended sterilization), a semen analysis will also reveal aspermia/azoospermia, but an almost normal volume of the semen, since the efflux of the seminal vesicles is not hindered. This is because approx. 80% of the volume of the semen is the gel-like fluid originating from the seminal vesicles whereas the fraction from the testicles / epididymis, which contains the spermatozoa accounts for only 5–10% of the volume of the semen. In addition, if an obstruction of the vasa deferentia is the cause for the azoospermia, the concentration of fructose in the semen will also be normal, since the fructose comes primarily from the fluid stored in the seminal vesicles. If the seminal-vesicles contain spermatozoa, but the semen does not, the obstruction must be downstream of the seminal vesicles and the ejaculatory ducts are very likely to be obstructed, provided that other causes for a dry ejaculation/aspermia such as an retrograde ejaculation are ruled out.

Attempts are sometimes made to diagnose an ejaculatory duct obstruction by means of medical imaging, e.g. transrectal ultrasound or MRI, or by transrectal needle-aspiration of the seminal vesicles. However transrectal ultrasound has a relatively low sensitivity of approx. 50% and thus is only a tool to rule-out cysts in the region of the orifices but is not sufficient to rule out an obstruction of the ejaculatory ducts due to other causes. In approx. 50% of cases of unexplained low-volume azoospermia MRI and TRUS do not reveal any pathological findings, because it is difficult to see alterations in a narrowed, scarred duct with these methods. Due to the blockage of ejaculatory ducts, enlarged seminal vesicles are frequently seen in patients with ejaculatory duct obstructions. However, this is again neither a proof of an obstruction nor do normal-sized seminal vesicles rule-out an obstruction of the ejaculatory ducts. Since ejaculatory duct obstruction is a relatively rare cause of infertility, this possibility may be unfamiliar to some physicians, even some urologists.

There is not enough known about persistent genital arousal disorder to definitively pinpoint a cause. Medical professionals think it is caused by an irregularity in sensory nerves, and note that the disorder has a tendency to strike post-menopausal women, or those who have undergone hormonal treatment.

Pre- and post-testicular azoospermia are frequently correctible, while testicular azoospermia is usually permanent. In the former the cause of the azoospermia needs to be considered and it opens up possibilities to manage this situation directly. Thus men with azoospermia due to hyperprolactinemia may resume sperm production after treatment of hyperprolactinemia or men whose sperm production is suppressed by exogenous androgens are expected to produce sperm after cessation of androgen intake. In situations where the testes are normal but unstimulated, gonadotropin therapy can be expected to induce sperm production.

A major advancement in recent years has been the introduction of IVF with ICSI which allows successful fertilization even with immature sperm or sperm obtained directly from testicular tissue. IVF-ICSI allows for pregnancy in couples where the man has irreversible testicular azoospermia as long as it is possible to recover sperm material from the testes. Thus men with non-mosaic Klinefelter's syndrome have fathered children using IVF-ICSI. Pregnancies have been achieved in situations where azoospermia was associated with cryptorchism and sperm where obtained by testicular sperm extraction (TESE).

In men with posttesticular azoospermia a number of approaches are available. For obstructive azoospermia IVF-ICSI or surgery can be used and individual factors need to be considered for the choice of treatment. Medication may be helpful for retrograde ejaculation.