The 33-year-old "Keeping Up With The Kardashians" star had originally planned the delivery method but backed out after seeing how brutally painful it looked when a friend recently opted for the birthing technique, reported TMZ online.
"Witnessed a water birth last night with @KhloeKardashian What an experience! All I can say is WOW! (sic)," Kourtney tweeted.
In order to keep their relationship strong, Kourtney and boyfriend Scott Disick, who already have a two-year-old son Mason together, recently revealed they are in therapy.
"He's grown so much over the years. I love seeing him as a dad - he's great with Mason - and I'm not saying that we're perfect. We go to therapy, which helps us a lot. I think we're always working to better ourselves, which I think a lot of people can do.
"I could go into the therapy session despising him, but by the time I leave - even if he's not in there - I feel like I understand him so much more," she said.