Kim Kardashian was worried she would never become a mother.

The reality TV star - who is currently expecting her first child with boyfriend Kanye West - was warned by doctors her fertility had been affected by years of being on birth control.

Speaking before she got pregnant by Kanye, the 32-year-old beauty said: ''When I went to the doctor a couple months ago, he took tests to check my hormones and my levels, and everything was really suppressed and really low because I've been on birth control for so many years.

''I want to have kids one day, so he really suggested that I get off birth control.

''I'm 31, and my egg levels came back as a woman that's in my 50s. I'm concerned just hearing all this information of how every woman is born with a certain amount of eggs, and that number can never be increased. Maybe this just isn't in the cards for me, and I'm freaking out a little bit.''

The news left Kim questioning whether she really wanted to have children.

Speaking on her new reality show 'Kourtney & Kim Take Miami' - which she stars in with sister Kourtney - Kim said: ''It's so overwhelming it's even made me second guess even wanting to have kids. Whatever's meant to be will be. If I'm not supposed to have kids then maybe I don't want kids.''

Kourtney has two children, three-year-old son Mason and six-month-old daughter Penelope, with her partner Scott Disick.