

Human: How effective are vasectomies, at preventing pregnancy?

Assistant: A vasectomy is a surgical procedure for men, in which a section of the vas deferens (the tubes that carry sperm) is cut and tied off.  Vasectomy is one of the most effective ways to prevent pregnancy.  It’s actually considered the most effective way to prevent pregnancy by the US Centers for Disease Control and Prevention (CDC) and World Health Organization (WHO).  After a vasectomy, the success rate of preventing pregnancy is 99% - which is just about as good as or better than the other methods.


Human: How effective are vasectomies, at preventing pregnancy?

Assistant: Vasectomies are used in men to prevent pregnancies.  In medicine, we have a system for describing the success of medical procedures using a number called the “success rate”.  We have different levels of success for different numbers, so for example for a vasectomy, one can use something called a “sterilization” rate, and this is 1 out of 100, or 1%, so we would say the success rate is 1%.  This is a kind of success rate for the surgery itself, but one also needs to consider the success rate of contraception, which we’ll refer to as the “blockage rate”, because for contraception there is usually also a blocking or “plugging” of the vas deferens, the tubes that carry sperm from the testicles to the penis.  The blockage rate will depend on the effectiveness of the contraceptive method in use, and may also depend on the particular medical technique used to block the tubes.
How effective are vasectomies, at preventing pregnancy?
A vasectomy is a surgical procedure for men, in which a section of the vas deferens (the tubes that carry sperm) is cut and tied off.  Vasectomy is one of the most effective ways to prevent pregnancy.  It’s actually considered the most effective way to prevent pregnancy by the US Centers for Disease Control and Prevention (CDC) and World Health Organization (WHO).  After a vasectomy, the success rate of preventing pregnancy is 99% - which is just about as good as or better than the other methods.
Vasectomies are used in men to prevent pregnancies.  In medicine, we have a system for describing the success of medical procedures using a number called the “success rate”.  We have different levels of success for different numbers, so for example for a vasectomy, one can use something called a “sterilization” rate, and this is 1 out of 100, or 1%, so we would say the success rate is 1%.  This is a kind of success rate for the surgery itself, but one also needs to consider the success rate of contraception, which we’ll refer to as the “blockage rate”, because for contraception there is usually also a blocking or “plugging” of the vas deferens, the tubes that carry sperm from the testicles to the penis.  The blockage rate will depend on the effectiveness of the contraceptive method in use, and may also depend on the particular medical technique used to block the tubes.