Kylie Jenner names her daughter Stormi

The reality star gave birth to her first child on Feb. 1.

"I'm sorry for keeping you in the dark through all the assumptions," she wrote Sunday's message to her fans. "I knew for myself I needed to prepare for this role of a lifetime in the most positive, stress free, and healthy way I knew how. There was no gotcha moment, no big paid real I had planned," Jenner continued. "I knew my baby would feel every stress and every emotion so I chose to do it this way for my little life and our happiness."

The reality TV star, who has launched a cosmetics line that Women's Wear Daily reported is on track to becoming a $1 billion brand by 2022, has said in the past that she is looking forward changing her lifestyle after becoming a parent.