Ole and Lena had been married a couple of years, and wanted
children, but nothing was happening. Finally Lena went in for
a medical checkup. After examining her, the doctor said, "I'm
sorry to tell you this, but you have a clinical deficiency, and
if you ever have a baby it will be a miracle.

Ole came home that evening to find Lena crying her eyes out,
and gently asked why.

"Oh, Ole", she replied, "The doctor says I have a fish in me, and
if I ever have a baby it will be a mackerel."