Kourtney Kardashian ''loved'' being pregnant.

The 'Keeping Up With the Kardashians' star - who has children Mason, nine, Penelope, six, and Reign, four, with her ex-partner Scott Disick - really enjoyed growing her babies in her belly because being a mother is her ''favourite role.''

Writing on her website Poosh.com, the 40-year-old beauty said: ''Being a mother is my favourite role in life. It gives me purpose, changed me for the better, and made me realise there is nothing else I would rather do with my time. It's been such an incredibly rewarding experience to watch my babies grow and cross milestones.

''I get so many questions about my pregnancies, and each one was a little bit different. I personally loved being pregnant and made it a point to really listen to my body. I stayed away from the typical foods to avoid during pregnancy like sushi, turkey, nitrates, and hot dogs--and I found myself craving frozen yogurt and cheeseburgers. Every day after yoga, Leila [her yoga teacher] and I would make this afterglow smoothie together, and every ingredient had a specific purpose.''

And, although carrying a baby can zap your energy, Kourtney made sure she exercised every day when she was pregnant with her three children.

She explained: ''When I was pregnant with Mason Disick, I ran outside with music every day for seven months. When I was pregnant with Penelope Disick and Reign Disick, I would do yoga or go on walks in my neighbourhood, usually with a stroller, and would do a lot of hills. When I was pregnant with Reign, I was in the Hamptons during the summer and remember doing the treadmill, StairMaster, and swimming a lot in the pool with the kids along with yoga.''