Khloe married basketball player Lamar Odom in 2009 and the star was open with her wish to get pregnant more or less straight after their lavish Hollywood wedding.
Khloe sadly filed for divorce at the end of 2013 after months of speculation surrounding reports on Lamar's infidelity.
Kim revealed to chat show host Jimmy Kimmel: ‘Khloe wasn't trying to get pregnant.’
She continued: 'She wasn't showing up to these doctor appointments on purpose and behind our backs because she knew it wasn't working.’
Despite Khloe finding herself unwilling to start a family with now ex-husband Lamar, Kim described how amazing Khloe is with her 7-month-old daughter North.
Kim said: ‘Khloe is definitely the best babysitter.’
She revealed that younger brother, Robert Kardashian, is less than impressive when it comes to babysitting duties.
The star said: ‘Rob is the worst. I wanted him to spend time with her the last day and asked him to babysit for an hour. I pretended I had a meeting and he never showed up. Kourtney said it was the worse idea ever.’
Kim also spoke out about her mother Kris Jenner’s split from stepdad Bruce.
She said: ‘it wasn't a surprise. They have been living as friends for a long time. You want your parents to be happy. It was more awkward for them to live together and not sleep in the same room.’
‘I think it's the time away has gotten them back to that really good friend place and they realised they're better off as friends.’