Full-term development of embryos fertilized <i>in vitro</i> and cultured in a plastic bag without using an incubator.

*<p>For fertility testing, three pairs were selected from each group at random.</p>a<p>vs. ^b, ^c vs. ^d; values with different superscript letters are significantly different (<i>P</i><0.05 by χ² tests or Student's <i>t</i>-tests).