A pregnancy without a uterus is known as an ecktopic pregnancy. It happens in women who conceive within their fallopian tubes.
This is *extremely* dangerous because the placenta will latch on the the surrounding walls of the tube and use it to nurture the fetus eventually bursting the tube and eventually latching on to the abdominal wall. Additionally no further eggs can travel down this tube once it is destroyed in this manner.
When the fetus comes to term, of course there is no birth canal for the fetus to exit, the placenta will burst and flood the abdomen with the amniotic fluid. Then the fetus will die.
Of course a ceasarian birth can be attempted and in all likelihood save the fetus. The problem then remains that the placenta has become completely attached to the abdominal wall, the musculature, and even internal organs. It must be excised from the abdomen and this is a very risky procedure. There is a high risk of hemorrhaging if a vein is cut in the process of excising.
A male could conceivably endure an ecktopic pregnancy but he would face the same dangers as a woman in that case.
That is why there is a uterus. It provides a rich source of capillaries for the placenta to bond to, allows the fetus to grow without bursting any tissue (it stretches), provide a canal for the expulsion of the amniotic fluid and the fetus, and is reusable in that after the birth has occurred the uterus will flush the placenta and allow another pregnancy to occur. Truly a remarkable organ.
Tink is right. Until you can get one of your own, it would be very dangerous to try anything like this yourself.
-Sandy (I played doctor a lot when I was a kid...)