United Kingdom, Oct. 16 -- Kim Kardashian feared her "life was over" when she got pregnant with daughter North.

The Kardashians star had stopped using birth control in her relationship with Kanye West after visiting a fertility clinic with her sister Khloe Kardashian - who at the time was trying to start a family with her then-husband Lamar Odom - and discovering she may have problems getting pregnant, but she didn't expect to conceive so quickly.

In an extract from Jonathan Van Meter's upcoming biography, Citizen Kim, published by The Cut, she said: "Seven months into dating Kanye, I got pregnant. We hadn't even had a first real fight until I was pregnant."

On visiting the fertility clinic with Khloe, she explained: "I was like, 'Don'...