According to LDS teaching could Adam and Eve have children before the fall?

2 Nephi 2:23 states > And they would have had no children; wherefore they would have > remained in a state of innocence, having no joy, for they knew no > misery; doing no good, for they knew no sin. Often, it is said that Adam and Eve *could* not of had children, based on this verse. But the verse says *would*, not *could*. Are there any other verses or latter day saint doctrine explaining whether or not they *could* have children?