The 25-year-old tweeted that she is expecting her first child with coach and boyfriend Marc McCarroll.
She and Japanese partner Yui Kamiji beat Marjolein Buis and Diede de Groot in the final at Wimbledon on 16 July.
“I thought: ‘If we start trying in May I could still play Wimbledon – and it worked,” she told The Mixed Zone.
“But I had no idea how incredibly sick I’d be. For three days I couldn’t leave the house.
“At the French Open, I was really, really ill – so sick I thought it was a stomach bug. Even the doctors thought it was a stomach bug.
“But by Wimbledon I was a little more prepared. I knew how to manage it.
Whiley says she plans to be back on court “in a year or 18 months” and has not ruled out competing at the Tokyo Paralympics in 2020.
In January, Serena Williams won the Australian Open singles title eight weeks into her pregnancy.
It was the 35-year-old American’s record-breaking 23rd Grand Slam singles title.
— Jordanne Whiley MBE (@jordannejoyce92) July 29, 2017