The unexpected pregnancy occurred only months after Peta did a June 2022 interview in which she had revealed she was currently undergoing in vitro fertilization after suffering three miscarriages in the prior two years.
"It brings me immense joy to finally announce that @maksimc and I are expecting our Chmerkovskiy #2," Peta wrote in an Instagram posting on Friday.
"After 2 years of constant struggle and heartache, 3 miscarriages and a failed embryo transfer... we have a healthy bun in the oven :)) It was a shock to all of us and we found out right before I was going in for my second round of IVF," she continued.
"I want to thank ALL OF YOU who've been on this fertility journey with me from the beginning. It feels like I'm sharing this news with my extended family. Thank you for sharing your stories and tips to get me through my IVF cycle and thank you for the plethora of encouraging comments and DM's ... I read them all."
"This news has brought extraordinary bliss to our family and we have so much to be grateful for."
The Dancing with the Starspro dancer shared additional details about her pregnancy in an interview with People.
"All natural, it happened," she said.
"I didn't even know I was pregnant for so long until I was really feeling sick. I danced through Dancing with the Stars with it. I started feeling weird, started feeling a little bit sick and a little bloated and I didn't want to test for weeks."
Peta explained she finally took a pregnancy test around the "six or seven-week" mark and was shocked to discover the results.
Peta competed on Season 31 of Dancing with the Stars last fall, however her participation in the competition ended up being unusually brief. She and her celebrity partner, actor Jason Lewis, were eliminated at the conclusion of Season 31's premiere when it streamed live on Disney+ on September 19.
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Peta and Jason were eliminated after they landed in the bottom-two couples based on the combined total of judges' scores and viewer votes that were cast live throughout the two-hour premiere.