Updates on Jenna Hinman's progress had been positive, but the family posted an urgent update to their Facebook page Sunday to say that her condition was deteriorating.
Friends who are running the page called for an emergency prayer request.
"Her vital signs have become unstable over the past 12 hours and her ventilator has been turned all the way up," they wrote. "There is speculation of infection and/or internal bleeding," according to the update posted at 10:53 a.m. Sunday.
They posted that night that she had developed pneumonia.
"Jenna is now on powerful medication to fight this infection and we will keep you updated as often as possible," the update stated. "Please continue to pray that Jenna's lungs will clear and heal quickly. Jenna's condition tonight is fragile and critical - she has fought valiantly thus far, and we truly believe she has a lot of fight left in her still."
The Syracuse Post-Standard, in an editorial today, wrote, "Thousands upon thousands" of people around the country rallied for the Hinmans.
"They sent messages of hope and inspiration," according to the piece. "They donated money. Many cried at Monday's news that Jenna had died. We didn't know her, but her story touched the essential fiber that makes us human, makes us care for those beset by troubles we can't imagine. Here, in the happiest moment of a family's life together, the birth of children, comes the saddest news of all."
The family has a GoFundMe. fund set up to raise money for their expenses associated with the ordeal.