The seminal vesicles are a pair of rounded sacks that are connected to the prostate and lie between the bladder and rectum. They are reservoirs for semen. Most of the ejaculate comes from the seminal vesicles. The fluid mixes with prostate fluid and testicle fluid in the prostate. All treatments for prostate cancer affect the ejaculate. A radical prostatectomy removes the seminal vesicles with the prostate so there is no ejaculate. The cells in the prostate that make the prostate secretions are also the same cells that develop cancer. Therefore, when the prostate is radiated, most men lose the ejaculate or the volume decreases significantly. The sexual function of erection and orgasm are not affected by surgery or radiation. Orgasm is associated with a "dry ejaculate" where the feeling of an ejaculate occurs during the orgasm without any fluid production. This condition also occurs with some medical conditions (diabetes) and some medications .
Question: Does the ejaculate return after radiation?
Answer: While some men have a very small ejaculate after radiation therapy, most men lose the ejaculate. If the ejaculate is diminished or gone, it will not return.
Question: Is there any negative effect of not having an ejaculate?
Question: Is the ejaculate a risk for my partner?
Answer: No. There are no cancer cells that are transmitted. After radiation, there is no risk to the partner from the ejaculate. However, after seed implantation, it is recommended that a condom be worn for a few weeks in case a seed comes out in the ejaculate. This is extremely rare, but could happen.