Yulhee revealed her past weight before her pregnancy in a video posted to her Youtube channel on April 15th. 

The new video detailed Yulhee's experiences while pregnant with twins. She admitted that while pregnant with her twins, she weighed 82 to 83 kilograms (180 to 182 pounds), saying: "I gained 28 kilograms (61 lbs) but I weighed myself yesterday and I'm down to 67 kilograms (147 lbs) now. I lost 16 kilograms (35 lbs) but I have 12 kilograms (26 lbs) left to go. I am depressed thinking I have to diet and exercise to lose this weight." 

Yulhee was also seen putting the children to bed, saying: "Let's do well with mom. Let's win this. I can do it because I am a mother of three."