Many men ask quietly in clinic: "I seem to ejaculate less than before," "I climax but almost nothing comes out," or "my urine is cloudy after masturbation, is something wrong?" These are common worries and are worth taking seriously.
Most semen is made by the prostate and the seminal vesicles, while sperm come from the testicles. During ejaculation the bladder outlet tightens so that semen moves forward and out through the urethra. If any step in this process is affected, for example the bladder outlet does not close well, nerve signals are damaged, a passage is blocked, or a gland that makes semen has a problem, semen volume can drop.
Semen volume naturally varies with how long it has been since the last ejaculation, age and general health, so one smaller amount does not necessarily mean a disease. This article covers the common causes of low semen volume, dry orgasm and retrograde ejaculation, the tests, and when to see a doctor. If your main concern is ejaculating too quickly, see premature ejaculation (Chinese page).
Key points: Low semen volume, less semen, or climaxing without semen coming out may medically be retrograde ejaculation (semen flowing back into the bladder), anejaculation, or a problem with how semen is made or released. Common related factors include prostate or bladder surgery, diabetes, spinal cord or nerve conditions, some medicines and a blocked ejaculatory duct. Retrograde ejaculation itself is usually not harmful to health but can affect fertility. If you are trying for a baby, have painful ejaculation or blood in the semen, or the change came on suddenly, have a urologist assess it.
What Is Low Semen Volume? Dry Orgasm vs Retrograde Ejaculation
Low semen volume means clearly less semen than usual comes out. If you feel an orgasm but almost no semen is released, it is often called a "dry ejaculation" or "dry orgasm". These terms describe symptoms, and the cause behind them needs to be worked out.
Retrograde ejaculation: where does the semen go?
Retrograde ejaculation means the bladder outlet does not close properly during ejaculation, so semen flows back into the bladder instead of out through the urethra. Typical signs are very little or no semen and cloudy urine the first time you pass urine after orgasm (because it contains semen). You still feel the orgasm, it is usually not harmful to health in itself, but it can affect fertility.
What are anejaculation and delayed ejaculation?
Anejaculation means you cannot ejaculate even though the erection is normal and you want to; delayed ejaculation means it takes a very long time to ejaculate. Both may be related to nerves, medicines or psychological factors. They are handled differently from retrograde ejaculation, so a doctor needs to tell them apart.
What Causes Low Semen Volume?
The causes of low semen volume can broadly be divided into semen flowing backwards (retrograde ejaculation), affected nerve signals for ejaculation, a blocked passage for semen, and problems with the glands or hormones that make semen. Frequent ejaculation and a short gap since the last ejaculation can also make a single amount look smaller.
Prostate or bladder surgery is a common related factor; for example, surgery to treat an enlarged prostate can affect how the bladder outlet closes. Some medicines for an enlarged prostate or high blood pressure, and some medicines for mood or mental health, can also reduce or delay ejaculation.
Diabetes can damage nerves and cause retrograde ejaculation or anejaculation; nerve conditions such as multiple sclerosis and spinal cord injury, as well as pelvic surgery, can also play a part. If semen volume is very low and there are fertility problems too, the doctor will also check whether an ejaculatory duct is blocked or hormone levels are low.
Can frequent masturbation or getting older reduce semen?
The shorter the gap between ejaculations, the smaller each amount usually is, and this is mostly temporary; getting older can also reduce semen volume and the force of ejaculation. But if the change is clear, lasting, or comes with other symptoms, it is still worth seeing a doctor. For common myths about masturbation, see masturbation and erectile dysfunction.
| Possible cause | Common situations | Possible clues |
|---|---|---|
| Retrograde ejaculation | After prostate or bladder surgery, diabetes, some medicines | Very little or no semen, cloudy urine after orgasm |
| Affected nerve signals | Diabetes, spinal cord injury, multiple sclerosis, pelvic surgery | Unable to ejaculate or delayed ejaculation, possibly with urinary problems |
| Medicines | Some prostate, blood pressure or mood-related medicines | Change appears after starting a medicine |
| Blocked passage or gland problems | Blocked ejaculatory duct, seminal vesicle problems, inflammation | Low semen volume, possibly with fertility problems or painful ejaculation |
| Temporary factors | Frequent ejaculation, a short gap since the last one, tiredness | Happens now and then and recovers with rest |
What Tests Are Done for Low Semen Volume?
The doctor will ask when the change started, whether no semen comes out at all, whether urine is cloudy after orgasm, about past surgery and illnesses, medicines you are taking, and whether you plan to have children, and will carry out a physical examination.
Urine test after ejaculation
If retrograde ejaculation is suspected, the doctor may ask you to collect urine after ejaculation for testing. Finding a large number of sperm in the urine supports the diagnosis of retrograde ejaculation. The test is simple and non-invasive.
Semen analysis and other tests
Semen analysis shows the semen volume and the number, movement and shape of sperm. You need to avoid ejaculating for a few days beforehand as instructed, and because results vary from day to day, the test may need repeating. If there are fertility problems as well, see male infertility; depending on the situation, the doctor may also arrange blood hormone tests or a transrectal ultrasound to check the ejaculatory ducts and seminal vesicles.
| Test | Main purpose | Notes |
|---|---|---|
| History and physical examination | Understand surgery, illnesses, medicines and fertility plans | Tell the doctor about every medicine you are taking |
| Urine test after ejaculation | Confirm whether it is retrograde ejaculation | Urine is collected after ejaculation |
| Semen analysis | Assess semen volume and sperm number, movement and shape | Avoid ejaculating beforehand as instructed; may need repeating |
| Blood hormone tests | Check whether hormone levels are low | Decided by the doctor according to symptoms |
| Transrectal ultrasound | Check for a blocked ejaculatory duct and the seminal vesicles | May be arranged when low semen volume comes with fertility problems |
How Is Low Semen Volume Treated, and What Can You Do Day to Day?
Treatment depends on the cause. If a medicine is the cause, the doctor may consider adjusting it, and ejaculation usually returns after it is stopped; but do not stop any medicine on your own, talk to the doctor who prescribed it first.
Retrograde ejaculation caused by surgery or nerve damage can sometimes be hard to reverse fully. If you are not planning children and it does not bother you, it usually needs no treatment; if you want children, the doctor may discuss medicine, or collecting sperm from the urine or testicles for assisted reproduction.
For day-to-day care, people with diabetes can lower the risk of nerve damage by keeping blood sugar well controlled; regular exercise, a healthy weight, stopping smoking and drinking less alcohol also help overall sexual function and urinary health.
Can supplements improve low semen volume?
This is not recommended. Low semen volume has many causes; supplements cannot deal with retrograde ejaculation or a blocked passage and may delay finding the real cause. Talk with your doctor before using any product.
When to See a Doctor About Low Semen Volume
Occasionally lower semen volume is mostly nothing to worry about, but it is worth seeing a doctor in these situations:
You are trying for a baby, or you and your partner have been trying for some time without success.
No semen comes out at all, urine is repeatedly cloudy after orgasm, or the change came on suddenly and persists.
Pain during or after ejaculation, see painful ejaculation; blood in the semen, see blood in semen.
Burning when passing urine, frequent urination, pain in the perineum or fever at the same time, which may be linked to an infection or prostatitis.
You have diabetes, recently had prostate or pelvic surgery, or the change began after starting a new medicine.
It can. If semen volume is very low or semen flows into the bladder, fewer sperm reach your partner. If you are planning a pregnancy, see a doctor together with your partner so that semen and fertility can be assessed.
Retrograde ejaculation itself is usually not harmful to health. Semen in the bladder leaves with urine, and you still feel the orgasm. The main effect is on fertility; if it bothers you or you want children, talk with your doctor about options.
Cloudy urine after orgasm can be a sign of retrograde ejaculation, with semen flowing into the bladder. Once in a while is not a big concern, but if it keeps happening and semen volume is clearly lower, see a doctor for a urine test after ejaculation.
Retrograde ejaculation can follow some prostate operations and is sometimes hard to reverse, but it usually does not affect orgasm or health. If you want children or it bothers you, discuss the options with your surgeon.
“Weak kidney” is not a medical diagnosis. The amount and thickness of semen change with how often you ejaculate, how long since the last time and your general health. If there is a clear, lasting change, have a urologist check it rather than taking tonics on your own.
See a urologist. The doctor will arrange tests based on surgery, illnesses, medicines and fertility plans; if you also have fever, painful ejaculation, blood in the semen or difficulty passing urine, see a doctor promptly.
Medical information references
- NHS: Ejaculation problems
- MedlinePlus (U.S. National Library of Medicine): Retrograde ejaculation
- MedlinePlus (U.S. National Library of Medicine): Semen Analysis
- NIDDK (National Institute of Diabetes and Digestive and Kidney Diseases): Diabetes, Sexual, & Bladder Problems
- European Association of Urology (EAU): Guidelines on Sexual and Reproductive Health (Disorders of Ejaculation)
Advice from the urologist
- Occasionally lower semen volume is mostly related to how often you ejaculate and how long since the last time; see a doctor if a clear change persists.
- Repeatedly cloudy urine after orgasm with almost no semen may be retrograde ejaculation, and a urine test after ejaculation can be arranged.
- If you think a medicine is involved, talk to your doctor first; do not stop medicines or buy supplements on your own.
- If you are planning a pregnancy, or also have painful ejaculation, blood in the semen or urinary discomfort, have a urologist assess it promptly.
Low semen volume is common but is often put off out of embarrassment. Most causes can be worked out through a consultation and simple tests, and if you want children there are different options to discuss. If semen volume drops clearly, nothing comes out, or urine is cloudy after orgasm, it is best to be examined by a urologist.
