This isn't the first time the Channel Nine star has opened up about her fluctuating weight. After Sarah and her husband Hayden finished filming The Block, she revealed she'd shed 8kg from her small frame to get her pre-baby body.
"I had so much baby weight it was driving me insane," Sara, 33, revealed on Instagram. "I got down to about 59kg for my wedding and then I went on my honeymoon and it crept back up to about 63kg, which was what I was going into The Block."
Like many contestants, the physical activity meant Sara lost weight, however it was post-filming indulgences that gave her the wake-up call.
"It felt like yo-yoing and I was never a yo-yoer. When I got home I thought, 'This is enough'."
She turned to friends who introduced her to a cleanse diet. "Someone got me onto Isagenix. It's a shake in the morning and then a snack, then I felt full and I was losing all this weight," she reveals.
"I didn't exercise one bit, either. For people who hate exercise, this is the perfect diet. Hayden's happy if I'm happy, but he loves my new body. It's done wonders for us romantically. Our relationship is really good."