Allemand was in critical condition and placed on life support Monday night.
The 28-year-old's publicist released the following statement earlier Monday: "Gia Allemand was taken to University Hospital, New Orleans last night following a serious emergency medical event, the details of which are currently not known. She is listed in critical condition."
"Ms. Allemand's mother is with her, along with her long-term boyfriend, NBA basketball player Ryan Anderson of the New Orleans Pelicans," the statement continued. "On behalf of the family, we kindly ask for privacy at this time."
Allemand appeared on 2010's season 14 of "The Bachelor" with Jake Pavelka. After being eliminated from the final three, she joined the season one cast of "Bachelor Pad."
Many "Bachelor" alums have taken to Twitter to send prayers:
twitter.com/jakepavelka1
Im not sure what has happened to @GiaAllemand but I'm praying for her. ?? Please take a second to do the same!
— Holly Julian (@HollyDurst) August 13, 2013
My prayers go out to @GiaAllemand 's family during this time. Life on earth is but a vapor and she's with our Lord now.
— Sean Lowe (@SeanLowe09) August 14, 2013
Please offer up your prayers for @GiaAllemand who is in critical condition in a hospital in New Orleans. @GwenGioia pic.twitter.com/J9SeO7Jzpl
— Dave Garner (@V1_man) August 13, 2013
Gia we love you and are ALL praying for you!!! #pray4gia ?? #repost http://t.co/BpFrLGc3Gr
— BlakeleyShea (@BlakeleyShea) August 14, 2013
Hey #BachelorNation send out a prayer for our girl @GiaAllemand
— Michael Stagliano (@MichaelStag) August 13, 2013
Got through 81 pages today, but having hard time focusing on work after hearing about Gia.Sending + thoughts 2 her & all who know & love her
— Trista Sutter (@tristasutter) August 14, 2013
Such a sad day...love, prayers, and thoughts to Gia's family and close friends :(
— Molly Mesnick (@MollyMesnick) August 14, 2013