Despite of stimulation of penis by masturbating or sexual intercourse, men with anejaculation are not able to ejaculate. 

There are two kinds of anejaculation, one is situational and the second one is total.

  • In situational anejaculation, men are able to ejaculate during masturbation, or have nocturnal emissions, but there is problem with ejaculation during sexual activity. Men can be in able to ejaculation with specific partner or in specific type of sexual activity. 
  • Total or complete anejaculation is divided into orgasmic and anorgasmic anejaculation. In orgasmic, men are able to achieve orgasm, but there is no semen. It can be caused by blockage of ejaculatory nerves or there can be some obstruction in ejaculatory ducts. On the other hand, in anorgasmic anejaculation, men are not able to have orgasm in any way of sexual arousal, even while they masturbate. 

Anejaculation, especially the orgasmic variant, is usually indistinguishable from retrograde ejaculation (when semen, which would, in most cases, be ejaculated via the urethra, is redirected to the urinary bladder). 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.

Anejaculation can have multiple causes. The main categories are physical causes or psychological causes.

1. Physical causes such as:

Ejaculatory duct obstruction (EDO) is a congenital or acquired pathological condition which is characterized by the obstruction of one or both ejaculatory ducts. Thus, the efflux of (most constituents of) semen is not possible. 

Damage to the spinal cord impairs its ability to transmit messages between the brain and parts of the body below the level of the lesion. This results in lost or reduced sensation and muscle motion, and affects orgasm, erection and ejaculation.

Multiple sclerosis, Parkinson’s disease and diabetes mellitus cause damage of nerves which can participate in ejaculation.

2. Psychological causes such as: 

A sexual inhibition is a conscious or subconscious constraint or curtailment by a person of behavior relating to specific sexual matters or practices or of a discussion of sexual matters.

Treatment depends on the causes and includes psychosexual counseling, drugs, penile vibratory stimulation and electro ejaculation.

Associated disease 


Risk factors 

Medication (antihypertensive, antipsychotic, antidepressants, alcohol) and surgery (aortoiliac surgery, retro peritoneal lymph node dissection, colorectal resection, prostatectomy (Pic. 1)) are the most common risk factors of anejaculation. The thoracolumbar sympathetic nerves cause contraction of the smooth muscles of the prostate, seminal vesicles and vas deferens leading to emission of seminal fluid into the urethra. Any surgery, which damage these nerves leads to problems with ejaculation. Nerve-sparing surgery reduces the risk that patients will experience erectile dysfunction. However, the experience and the skill of the nerve-sparing surgeon, as well as any surgeon are critical determinants of the likelihood of positive erectile function of the patient.

Ejaculatory duct obstruction is the underlying cause for 1–5% of male infertility. If both ejaculatory ducts are completely obstructed, affected men will demonstrate male infertility due to aspermia/azoospermia. They will suffer from a very low volume of semen which lacks the gel-like fluid of the seminal vesicles or from no semen at all while they are able to have the sensation of an orgasm during which they will have involuntary contractions of the pelvic musculature. This is contrary to some other forms of anejaculation.

Men with spinal cord injury (SCI) rank the ability to father children among their highest concerns relating to sexuality. Male fertility is reduced after SCI, due to a combination of problems with erections, ejaculation, and quality of the semen. As with other types of sexual response, ejaculation can be psychogenic or reflexogenic, and the level of injury affects a man's ability to experience each type. As many as 95% of men with SCI have problems with ejaculation (anejaculation), possibly due to impaired coordination of input from different parts of the nervous system. Erection, orgasm, and ejaculation can each occur independently; however the ability to ejaculate seems linked to the quality of the erection, and the ability to orgasm is linked to the ejaculation facility. Even men with complete injuries may be able to ejaculate, because other nerves involved in ejaculation can effect the response without input from the spinal cord. In general, the higher the level of injury, the more physical stimulation the man needs to ejaculate. Conversely, premature or spontaneous ejaculation can be a problem for men with injuries at levels T12–L1 (12th thoracic nerve and 1st lumbal nerve) (Pic. 2). It can be severe enough that ejaculation is provoked by thinking a sexual thought, or for no reason at all, and is not accompanied by orgasm. 

Most men with spinal cord injury have a normal sperm count, but a high proportion of sperm are abnormal; they are less motile and do not survive as well. The reason for these abnormalities is not known, but research points to dysfunction of the seminal vesicles and prostate, which concentrate substances that are toxic to sperm. Cytokines, immune proteins which promote an inflammatory response, are present at higher concentrations in semen of men with SCI, as is platelet-activating factor acetylhydrolase; both are harmful to sperm. Another immune-related response to SCI is the presence of a higher number of white blood cells in the semen.

Reduce the risk of a spinal cord injury or in cases, that anejaculation is caused psychologically, what is necessary is to talk about the problem and do not avoid it. There are psychotherapies who are specially focus on sexual problems.


Psychological therapies include sex therapy and cognitive or cognitive-behavioral therapy:

Sex therapy is a form of psychotherapy. Sex therapists assist those experiencing problems in overcoming them, in doing so possibly regaining an active sex life. It is approached with ambivalence in social, religious, and educational systems. The transformative approach to sex therapy aims to understand the psychological, biological, pharmacological, relational, and contextual aspects of sexual problems.

Cognitive therapy (CT) and cognitive-behavioural therapy (CBT) are closely related; however CBT is an umbrella category of therapies that includes cognitive therapy. Cognitive therapy seeks to help the client overcome difficulties by identifying and changing dysfunctional thinking and behavior, as well as emotional responses. This involves helping patients to develop skills for modifying beliefs, identifying distorted thinking, relating to others in different ways, and changing behaviors. Treatment is based on collaboration between the patient and therapist and on testing beliefs. CBT is a psychotherapeutic approach that addresses dysfunctional emotions, maladaptive behaviors, and cognitive processes through a number of goal-oriented, systematic procedures. The category refers to behavior therapy, cognitive therapy, and therapies based on a combination of basic behavioral and cognitive principles and research.


If anejaculation is caused by mild neurological disorders, sometimes there is possibility to treat it with sympathomimetic agents such as ephedrine. In patients with physical causes of anejaculation (except SCI), the administration of midodrine (antihypotensive agent) induces antegrade (normal ejaculation, i.e., forward) and/or retrograde ejaculation in more than 50% of patient.

Surgical therapy 

A method to treat ejaculatory duct obstruction is transurethral resection of the ejaculatory ducts (TURED). This operative procedure is relatively invasive, has some severe complications, and has led to natural pregnancies of their partners in approximately 20% of affected men. A disadvantage is the destruction of the valves at the openings of the ejaculatory ducts into the urethra such that urine may flow backwards into the seminal vesicles. Another, experimental approach is the recanalization of the ejaculatory ducts by transrectal or transurethral inserted balloon catheter. Though much less invasive and preserving the anatomy of the ejaculatory ducts, this procedure is probably not completely free of complications either and success rates are unknown. There is a clinical study currently ongoing to examine the success rate of recanalization of the ejaculatory ducts by means of balloon dilation.

Other therapy

The first-line method for sperm retrieval in men with spinal cord injury and inability to ejaculate 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. Functional Electrical Stimulation (FES) is a technique of eliciting controlled neural activation through the application of low levels of electrical current. The initial goal of FES technology was to provide greater mobility to the patients after SCI. Other functional applications of FES which help to restore useful functions and thus improve the quality of life include bladder and bowel voiding and electro-ejaculation. 

Electroejaculation is one of the several techniques now available to harvest viable sperm for the purposes of artificial insemination or in vitro fertilization. An electric probe is inserted into the rectum near the prostate to stimulate the nerves and contract the pelvis muscles, causing ejaculation. The ejaculate is collected from the urethra and prepared for use in artificial insemination. Caution need to be taken in men with SCI who have a history of autonomic dysreflexia as electroejaculation can cause a significant increase in blood pressure and heart rate.

Usually, men with obstruction of ejaculatory duct have a normal production of spermatozoa in their testicles, so that after spermatozoa were harvested directly from the testes e.g. by TESE (Testicular Sperm Extraction) or MESA, PESA techniques are potentially candidates for some treatment options of assisted reproduction e.g. in-vitro fertilization.

When the number of motile sperm is too low for conventional IVF, the method of intracytoplasmic sperm injection (ICSI) is often used to achieve fertilization. ICSI is a procedure in which a single sperm is injected directly into the egg.

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Anejaculation ―sourced from Wikipedia licensed under CC BY-SA 3.0
Ejaculatory duct obstruction ―sourced from Wikipedia licensed under CC BY- SA 3.0
Sexuality after spinal cord injury ―sourced from Wikipedia licensed under CC BY- SA 3.0
Sexual inhibition ―sourced from Wikipedia licensed under CC BY- SA 3.0
Prostatectomy ―sourced from Wikipedia licensed under CC BY- SA 3.0
Sex therapy ―sourced from Wikipedia licensed under CC BY- SA 3.0
Cognitive and Cognitive-Behavioral Therapies ―sourced from Boundless licensed under CC BY- SA 4.0
Functional Electrical Stimulation in Paraplegia ―sourced from Intechopen licensed under CC BY 3.0
Prostatectomy ―by BruceBlaus licensed under CC BY- SA 4.0
Sexuality after spinal cord injury ―by Lynch licensed under CC BY 2.5
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