Iran has made clear which of the three American hikers it will release this weekend: It's the lone female, Sarah Shourd. The 31-year-old is expected to be freed Saturday to mark the end of Ramadan, reports CNN. Left behind will be her fiance, Shane Bauer, and Josh Fattal, both 27. All three were detained 13 months ago after they apparently strayed over the border while hiking in Iraq. Shourd has told her mother she has medical problems, including a breast lump. (More Sarah Shourd stories.)