A number of years ago (1984, I think I was pg. with Tim), there was an
article in a popular science magazine (now, this is really pushing my memory
buttons).  At any rate, I had read the article, and then Shiela Kitzinger
spoke using this article as a jumping off point for a conference she was
doing in WI.  At any rate, the gist of the article was that someday, in the
not-too-distant future, we would be able to have cows gestate our (human)
offspring so that we wouldn't be bothered with the discomforts of pregnancy.
 The article was written seriously - they had already done experiments with
implanting one species inside another for gestation purposes.  There were
LOTS of other things in the article, but that one piece of information made
more impression on me than anything else, probably because I was pregnant,
and also because there was a drawing of a cow with a human baby in the cow's
womb...  Scary thought, isn't it?

Jan B.