Mirza and her American women's doubles partner Madison Keys lost their Dubai Tennis Championships 2023 first-round match 4-6, 0-6 to Veronika Kudermetova and Liudmila Samsonova.
The 25-year-old revealed the news in a social media post, penning a heartfelt note to fans in both English and Japanese that accompanied a photo of a sonogram.
She initially wanted to retire from the sport at the end of the previous season, but her elbow injury ruled her out of US Open and forced her to end 2022 as early as August.