[aephi alum]

It depends on the PNM and on the school, and on why the PNM didn't have a successful rush experience before.

Speaking from an NPC perspective here.....

It's usually pretty difficult for a junior or senior PNM to have a successful FR experience, unless juniors and seniors are free or under a separate quota. A PNM would have to be pretty stellar to be favored over freshmen who can devote 4 full years to the chapter.

For sophomores, it's a bit different. A sophomore still has 3 years ahead of her, possibly more. If the sophomore was released across the board when she rushed her freshman year, she should think about why she was cut. (No sorority is going to tell her why she was cut, of course.) Were her grades iffy? If so, has she pulled them up? Did she have a bad reputation? If so, has she worked to improve it? If she is a better candidate now than she was a year ago, she should go for it.

But if a PNM has gone through FR twice unsuccessfully, maybe it just wasn't meant to be, and it's time for her to move on and devote her energies to something else.