Congenital Bilateral Absence of the Vas Deferens: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Congenital Bilateral Absence of the Vas Deferens?
A urologist usually manages this condition, often with extra training in male infertility. A genetic counselor often joins the care team. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is congenital bilateral absence of the vas deferens?
Congenital bilateral absence of the vas deferens is a condition that a male is born with. The vas deferens is the tube that carries sperm from each testicle toward the penis. When both tubes are missing, sperm cannot leave the body, which usually causes infertility.
People with this condition are born without the two tubes that carry sperm out of the body. The testicles still make sperm, but the sperm have no way out, so the semen contains none. Doctors call this obstructive azoospermia. Erections and sex are not affected; mainly fertility is.
Symptoms
Most men have no symptoms and learn about it only when a semen test, done after trouble fathering a child, shows no sperm. Some have mild signs related to cystic fibrosis, such as sinus, lung or digestive problems, but most have none.
Causes and who gets it
This condition is closely linked to the gene that causes cystic fibrosis. Many men with the missing tubes carry changes in this gene, even without developing the disease. Some cases happen without any known gene change.
How doctors diagnose it
A doctor usually finds the condition during an infertility workup. A physical exam can show the vas deferens is missing on both sides, and a semen test confirms no sperm. Genetic testing often checks for cystic fibrosis gene changes.
Treatment
The missing tubes cannot be replaced, so the main question is fertility. One common method removes sperm directly from the testicles with a needle, then uses them with in vitro fertilization, where an egg is fertilized outside the body. A couple should meet with a genetic counselor first.
When to see a doctor
See a doctor if you have tried to get pregnant for a year without success, or after six months if the woman is over 35.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance; a concierge doctor usually charges more and often works alongside insurance. Either kind can order the first tests and refer the patient to a urologist and fertility specialist.
Common questions
Can this condition be cured?
No, the missing tubes cannot be replaced or repaired. However, many men with this condition can still father children with medical help. Results differ from person to person.
Does it affect sex life?
No. Erections, orgasm, and the ability to have sex are not affected. The semen simply contains no sperm.
Does having this condition mean I have cystic fibrosis?
Not usually. Many men with the condition are only carriers of the gene change and never develop the disease. Genetic testing can show which changes a man carries.
Can my children inherit it?
It depends on the gene changes both parents carry. A genetic counselor can test both partners and explain the chances for each pregnancy.
Sources
- NIH Genetic and Rare Diseases Information Center - Congenital bilateral absence of vas deferens
- MedlinePlus - Infertility
- MedlinePlus - Cystic Fibrosis
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
