Is It Normal for Semen to Smell

Sperm is made up of many different cells, which are called gametes. These gametes have their own DNA and separate from each other. Each cell contains its own unique genetic material (DNA). When a person ejaculates, these individual cells combine with one another to form a single large mass known as a “semen”. The combined DNA will then become part of the next generation of human beings.

The smell of a man’s seminal fluid varies depending upon how much testosterone is present in his body. If a man has low levels of testosterone, he may not produce enough seminal fluid to cause him to smell fishy. However, if he has high levels of testosterone, his seminal fluids will likely contain a strong odor due to the presence of various chemicals such as prostaglandins and steroids.

In some cases, men with prostate cancer have been found to produce a foul smelling urine. Prostate cancer is usually caused by the overproduction of certain types of hormone-like substances. Some of these substances include prostaglandins and other steroidal hormones.

It is possible that if a man has a condition known as “BPH” or bladder outlet obstruction, his seminal fluid may smell fishy due to the presence of bacteria living inside the urinary tract.

Regardless of why your boyfriend’s ejaculate smells, the best course of action is to seek medical attention as soon as possible. In some cases, prostate cancer is a slow growing condition that may never cause any health problems during a man’s lifetime. In other cases, however, prostrate cancer can spread to other parts of the body and cause life-threatening illnesses. In addition to prostate cancer, a man may have another condition known as “BPH” or bladder outlet obstruction. This condition is also caused by the overproduction of hormones.

If not treated, this condition can lead to urinary tract infections and in some cases kidney failure.

The best way to prevent these types of conditions from developing is to maintain a healthy diet and get regular checkups with a urologist. If you are worried that your boyfriend is experiencing a medical condition, it is best to encourage him to see a medical professional as soon as possible. In some cases, prostate cancer has no symptoms and can be treated if caught early enough. It is also important to remember that not all men who experience “BPH” or bladder outlet obstruction go on to develop prostate cancer. Some men live their entire lives without ever experiencing adverse health effects.

Sources & references used in this article:

Morphologic changes in normal human semen after ejaculation by AG Oettle – Fertility and Sterility, 1954 – Elsevier

Bacterial contamination of boar semen affects the litter size by LOM Martín, EC Muñoz, F De Cupere… – Animal Reproduction …, 2010 – Elsevier

Journal of the Hillside Hospital. XVII, 1968: The Smell of Semen. Leonard Shengold. Pp. 317-325 by DJ Coleman – Psychoanalytic Quarterly, 1970 –


Olfactory imagination and olfactory hallucinations: an experimental and clinical study of the sense of smell in normal and in psychotic persons by GW Harris – 1955 – E. Arnold