SCI Fertility and Anejaculation
Fertility in Spinal Cord Injury and Neurogenic Anejaculation: PVS, Electroejaculation and ART
Evidence grade 4 of 5, Strong. Read how the Atlas grades evidence.
The written rationale for this grade is still being prepared.
- FDA
- PVS devices and assisted reproduction are established; specific tools vary in regulatory status
Reference only. Not medical advice.
What can go wrong
Autonomic dysreflexia is a serious procedural hazard during PVS and electroejaculation in lesions at or above T6 and requires blood-pressure monitoring and pretreatment. Retrieved SCI semen characteristically has poor motility and viability despite adequate counts, so successful collection does not guarantee easy conception and assisted reproduction (often IVF/ICSI) is frequently needed. Retrograde ejaculation may require urine alkalinization and bladder sperm recovery; repeated PVS can abrade penile skin.
This is something to take to a clinician. The Atlas can tell you what is known about sci fertility and anejaculation in general. It cannot tell you what is happening in your body, and the difference matters most for exactly the symptoms that bring people to this page.
Most men with spinal cord injury and other causes of neurogenic anejaculation produce sperm normally; the barrier to fertility is the failure of the ejaculatory reflex, not failure of spermatogenesis. The retrieval ladder begins with penile vibratory stimulation (PVS), which uses high-amplitude vibration to trigger the spinal ejaculatory reflex and is most successful in lesions above T10 with an intact reflex arc; it is non-invasive and can sometimes yield a specimen usable for home or office insemination. When PVS fails (commonly in lower lesions lacking the reflex arc), electroejaculation delivers controlled electrical stimulation via a rectal probe. A characteristic and not fully explained feature of SCI semen is markedly impaired sperm motility and viability despite adequate counts, which often necessitates intrauterine insemination or IVF/ICSI. Autonomic dysreflexia is a serious procedural hazard in lesions at or above T6.
Sperm production is usually intact, the obstacle is delivery, and modern retrieval plus assisted reproduction makes biological fatherhood realistic for most.
What people take it for
What it is taken for. Approval, where it exists, covers only some of these.
- PVS
- First-line retrieval, especially higher/UMN lesions; can enable home insemination
- Electroejaculation
- When PVS fails, including lower/LMN lesions
- Surgical sperm retrieval
- When ejaculatory methods fail, for use with IVF/ICSI
- Assisted reproduction
- IUI or IVF/ICSI given characteristic low motility
How it works
Ejaculation requires emission (sympathetic, T10-L2, moving sperm and seminal fluid into the posterior urethra) and expulsion (rhythmic somatic contraction via pudendal motor neurons). SCI disrupts the supraspinal facilitation and segmental coordination of this sequence, producing anejaculation. PVS exploits the pudendal afferent reflex: intense vibration at the glans drives the spinal ejaculatory generator when the relevant cord segments and reflex arc are intact, hence higher success in higher (UMN) lesions. Electroejaculation bypasses the need for an intact reflex by directly stimulating the periprostatic sympathetic plexus to induce emission, succeeding even in lower-motor-neuron lesions where PVS fails.
The motility paradox, why retrieved sperm underperform
A distinctive feature of SCI fertility, well documented by the Miami SCI fertility program (Brackett and Lynne), is that men with SCI typically have NORMAL sperm concentration but abnormally low sperm motility and viability. The cause is not fully settled but is attributed to factors in the seminal plasma and accessory-gland secretions, chronic stasis, scrotal temperature and inflammatory/immune factors rather than a defect of sperm production itself. This is why simply obtaining a specimen is not the end of the problem: the impaired motility frequently pushes couples toward intrauterine insemination or, more often, IVF with intracytoplasmic sperm injection (ICSI), where a single viable sperm suffices.
Safety in detail
- Autonomic dysreflexia is a real emergency risk in lesions >= T6 during PVS and electroejaculation, monitor blood pressure and pretreat
- Repeated PVS can abrade penile skin
- Retrograde ejaculation may require alkalinizing urine and recovering sperm from the bladder
What people get wrong
Often saidSpinal cord injury causes male infertility
ActuallyIt causes ejaculatory failure, not (usually) failure of sperm production; with retrieval and assisted reproduction, biological fatherhood is achievable for the majority.
Often saidIf you can collect sperm, pregnancy is straightforward
ActuallySCI semen has characteristically poor motility, so assisted reproduction (often IVF/ICSI) is frequently required even after successful retrieval.
Who profits, and who pushes back
Nobody is named here yet, because we have not done that work on this entry. Read that as unfinished. Somebody almost certainly sells this, and somebody almost certainly disputes it. Assume both until we have checked.
Set against the alternatives
PVS is preferred when feasible because it is non-invasive, repeatable, can be self-administered, and may yield antegrade ejaculate suitable for less invasive insemination. Electroejaculation is more broadly applicable (including LMN lesions) but is more invasive, often produces retrograde or poorer-quality specimens, and may require anesthesia in men with preserved sensation.
What we do not know
- What precisely causes the SCI motility defect, and can it be reversed to allow less invasive conception?
- Can the spinal ejaculatory generator be activated pharmacologically as an alternative to electroejaculation?
At a glance
- Spermatogenesis
- Usually intact in SCI
- First retrieval step
- Penile vibratory stimulation (PVS)
- PVS best in
- Lesions above ~T10 with intact reflex arc
- Second step
- Electroejaculation
- Signature finding
- Low motility despite adequate count
What this entry does not yet cover
What follows is unfinished work on our side, not a finding about SCI Fertility and Anejaculation. A short entry is not a safe entry.
- Timeline. We have not built the dated record of research and regulatory events.
- Cost and market. We have not documented what it sells for or who sells it.
- Supply chain. We have not mapped where it is made.
- Who uses it. We have not documented the user groups.
- What could change. No forward-looking summary yet.
- Children and teenagers. We have not checked what is known about younger people.
Sources
The studies below are named and described, but not linked. You cannot open them from here and check our reading against them, which means this page is our summary of the literature rather than a document you can verify. Weigh it accordingly until the links exist.
The studies that matter
Brackett, Lynne and colleagues, Miami SCI fertility program1990s-2010s
Systematized PVS and electroejaculation, reported rising PVS success with optimized technique, and characterized the impaired motility/viability of SCI semen despite adequate counts
Series of assisted reproduction outcomes using PVS/electroejaculation specimens2000s-2010s
Demonstrated achievable pregnancy/live-birth rates with IUI and IVF/ICSI in SCI couples