Cathy Weeks wrote:
I think you should probably trust numbers from an independent website.
Mirena says it's more effective by a very slight margin, than
vasectomy. 99.9% effective, as opposed to 99.85% for V, and 98-99.2%
for a copper T. So I suspect that looking at a website that isn't
skewed toward one type or another is a good thing to do. ;-)

Cathy Weeks

Any report of vasectomy effectiveness needs to be looked at closely for
what it measures exactly. Does it look at reported incidences of
vasectomy failure caught at the time the semen is checked or at
pregnancies in women whose partners have been vasectomized? In the
former case, this is not a very serious form of failure, because no
harm is done, and the vasectomy procedure can be repeated. In the
latter case, does the study distinguish between pregnancies following
certification of the man's sterility and pregnancies occuring before
certification? (Many men fail to have their semen tested after
vasectomy, despite warnings, so this is potentially a major cause of
vasectomy "failure.") Likewise, does it distinguish between pregancies
post vasectomy that have been confirmed as caused by the vasectomized
man and those in which the poolboy may have played a role?

One nice feature of vasectomy is that its effectiveness can be easily
confirmed by regular semen checks. In the case of many other forms of
bc, including tubal ligation, as I understand it, an unwanted pregnancy
is the only sign.

trifold
www.vasectomy-information.com