Semen is produced in the following way:
- The testicles produce millions of sperm cells.
- The sperm cells ripen and are stored in the epididymides.
- When a man has an ejaculation, the sperm cells are pushed through the sperm ducts.
- The sperm cells are transported to the prostate and seminal vesicles. Fluid is added to the sperm cells. Together the fluid and the sperm cells make up the semen.
- The semen is pushed out of the penis through the urethra.
When is a man fertile?
A man produces semen for the first time during puberty. In general, a boy becomes fertile between the ages of 12 and 15. He can then have children. Even if he is having sexual intercourse for the first time.
A man produces sperm cells his entire life. He can often have children his entire life.
Contraception: withdrawal and sterilsation
A woman can only get pregnant if sperm cells enter the woman’s uterus via her vagina during her fertile days.
Before he ejaculates, a man may already lose a bit of fluid that might contain sperm cells. Withdrawing the penis before ejaculation is not a safe method of contraception.
A man who has undergone sterilisation produces semen without sperm cells. He can have sexual intercourse in the normal way.
More information or help needed?
General practitioner
You can talk to a general practitioner about every intimate topic. If necessary, a general practitioner can refer you to a specialised health professional. Refugees who have been granted (temporary) asylum choose a general practitioner in their municipality. Asylum seekers in an asylum seekers’ centre can consult a general practitioner at the centre.