"TRY GETTING PREGNANT THIS WAY" joke

A young married couple has difficulties conceiving a baby, so
after a while the wife consults her doctor, who recommends the
minor of three possible operations.
The operation is performed, but a month later, she's still not
pregnant, so she goes to see the doctor again. This time he
recommends the medium operation, a somewhat more serious
operation, but still not as complicated as the third alternative.
But, there's still no result, and another month later she's back
in the doctors office, and this time she gets the big one.
After having recovered in some weeks, the couple resumes
normal marital activities, and this time they actually succeed in
conceiving a baby.
Filled with joy, the young wife now sees the doctor for the regular
examination during pregnancy and says, "We're so happy doctor, we're finally having a baby. But what was this
third operation actually all about? The first two weren't that bad,
but this last one I think must have been quite a job, I was dizzy
for weeks after."
"Well," the doctor replies, "since the first two standard
operations failed, we started suspecting your method rather
than your ability, so I made a connection from your throat to
your uterus."