Try carrying the fetus and giving birth from any other location. I suppose having the fun parts somewhere else than the reproductive dumping tube could be nice, but wouldn’t make any sense.
Consider the chicken, with its ingenious production line of eggs. Constant fertilization from a different orifice seems ideal, as (the source I just Googled suggests that) chickens have very short fertilization cycles. (They don’t have separate orifices. Poor cloacas.)
Since fertilization occurs at one end of a long tube, and birth occurs at the other, I wouldn’t be surprised if the optimal arrangement involved separate organs.
Try carrying the fetus and giving birth from any other location. I suppose having the fun parts somewhere else than the reproductive dumping tube could be nice, but wouldn’t make any sense.
Consider the chicken, with its ingenious production line of eggs. Constant fertilization from a different orifice seems ideal, as (the source I just Googled suggests that) chickens have very short fertilization cycles. (They don’t have separate orifices. Poor cloacas.)
Since fertilization occurs at one end of a long tube, and birth occurs at the other, I wouldn’t be surprised if the optimal arrangement involved separate organs.