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Leah Messer's twin daughters, Aliannah and Aleeah, are both equally adorable, but one suffers from a developmental condition that doctors have had trouble diagnosing. Aliannah Hope has been in and out of hospitals since she was born on December 16, 2009, and now Leah and ex-husband Corey Simms finally have some answers.

Back in December 2012, Aliannah was admitted to the hospital for a round of specialized medical tests and doctors were finally able to give her an official diagnosis (you may recall that emotional moment from Teen Mom 2's Season 4 finale). But it wasn't until the Season 5 premiere on January 21, 2014 that Leah divulged the diagnosis on national TV — a rare form of muscular dystrophy.

"They explained to me it's the Ullrich congenital muscular dystrophy. It deteriorates the muscles," Leah tells her friend Kayla. "I felt like someone kicked me right in the freakin' throat."

Leah goes on to explain that the disorder affects the respiratory system and gets progressively worse over time.

"The bigger she gets, the more weight she gains, the harder it'll be for her muscles to carry the weight," Leah says. "But no matter what, she'll be smart, I'll take care of her, and I will make her as independent as I can so she can be happy with her life."

Despite Ali's condition, she's been progressing exceptionally well, even walking short distances on her own. As for her sight, she rocks a pair of hot pink glasses to help correct her vision. Every day she overcomes new and different obstacles, and Leah couldn't be more proud.

"This little angel is fine," Jeff Simms (father of baby daddy Corey Simms) tweeted when Ali was in the hospital. "She as well as her family just need any and all prayers right now."

Aliannah is certainly in our prayers, and we're glad doctors were able to give Leah and her family some much-needed answers.

For more information and on Ali's condition, visit Genetics Home Reference