Kim Kardashian no longer smiles in photographs and the reason stems from her first pregnancy with her daughter, North West.

In a new interview with C Magazine the "Keeping Up with the Kardashains" star said she had an extremely rough first pregnancy and was suffering from a medical condition, which caused her to bloat. Kardashian was heavily scrutinized by the media for her weight gain, something she could not help thanks to her condition.

"I gained 50 pounds, and it's tough to get it off. I was dedicated, but also, it changed the way I viewed wanting my picture taken. Before I was always smiling and so into being out and about. After I had the baby, I was like, 'These are the same people that made fun of me, and posted the stories that were so awful, calling me fat for something I couldn't control,' " Kardashian said, according to Us weekly. "I don't want to smile for them. I don't want to be out. Even if I was more confident, I just didn't feel like being that girl who was going to be smiling for every photo. It changed my mood; it changed who I was; it changed my personality a lot."

Earlier this year Kardashian announced she was pregnant with her second child, a boy due in December. She also opened up about her struggle to conceive again. "It was over a year of trying, and I had so many complications. It was a long road. I would go to the doctor in Beverly Hills every day at five in the morning to get tested to see if I was ovulating," she says, according to People magazine.