请教前辈：可以在母亲探亲期间申请移民吗？

妈妈退休了，好不容易盼来能来美国探亲6个月。如果在她探亲期间为她申请移民，有可能在这6个月期间办下来吗？
如果不行，可不可以滞留美国直到有个结果还是要回国去等？
如果选滞留，今后申请父亲移民或探亲会不会有麻烦？

另一个可能是在她来探情前在国内申请移民。可有人说在申勤移民期间会被拒入美国。不知是真还是有误。

先谢过前辈能指点迷津。

所有跟帖： 

• My parents just got their GCs in 3 months -techy- ♀ (74 bytes) () 08/14/2009 postreply 06:43:43

• Were they interviewed? My mom received an interview -treadwater- ♂ (7 bytes) () 08/14/2009 postreply 08:14:23

• Yes -techy- ♀ (140 bytes) () 08/14/2009 postreply 09:32:57

• 回复：My parents just got their GCs in 3 months -boboyoyojojo- ♀ (268 bytes) () 08/14/2009 postreply 22:12:48

• 回复：回复：My parents just got their GCs in 3 months -ID6684- ♂ (0 bytes) () 08/15/2009 postreply 10:13:05