Former Taliban hostage Joshua Boyle said on Tuesday his wife is in hospital in Canada, only a week after the family was rescued by Pakistani troops.
Boyle said his wife, Caitlan Boyle, was admitted on Monday. His email did not specify why she was taken to the hospital.
"My wife has been through hell, and she has to be my first priority right now," Boyle wrote.
Canadian Boyle, his American wife and their three children were rescued on Wednesday, five years after the couple was abducted in Afghanistan on a backpacking trip. The children were born in captivity.
Joshua Boyle said after landing at Toronto's airport on Friday that the Taliban-linked Haqqani network killed his infant daughter and raped his wife during the years they were held.
On Monday, Boyle said he and his wife decided to have children even while held captive because they always planned to have a big family and decided, "Hey, let's make the best of this and at least go home with a larger start on our dream family."
"We're sitting as hostages with a lot of time on our hands," Boyle said.
"We always wanted as many as possible, and we didn't want to waste time. Cait's in her 30s, the clock is ticking."
Boyle said their three children are now 4, 2 and "somewhere around 6 months."
"Honestly we've always planned to have a family of 5, 10, 12 children ... We're Irish, haha," he wrote in an email.
The parents of Caitlan Boyle have said they are elated she is free, but also angry at their son-in law for taking their daughter to Afghanistan.
"Taking your pregnant wife to a very dangerous place, to me, and the kind of person I am, is unconscionable," Caitlan's father, Jim Coleman said.