Kourtney Kardashian is open to having more kids.

The 39-year-old reality TV star - who already has kids Mason, eight, Penelope, six, and Reign, three, with her ex-partner Scott Disick - has revealed that while she doesn't have any immediate plans to have more children with boyfriend Younes Bendjima, she isn't ruling out extending her brood, either.

Speaking to E! News, she said: ''I think the thought is always in the back of my mind. Never say never.''

Kourtney - who was the first of her siblings to become a parent - spoke about how blessed the Kardashian-Jenner clan were to have so many new babies joining their world-famous family, with sisters Kim, Khloe and Kylie all recently having had babies.

She gushed: ''It's such a blessing. I don't even know how we got here with so many babies but it's so amazing.

''Just the fact that our kids can all grow up together ... it's such a magical time in our family.''

The oldest of the siblings also praised first-time mothers Khloe and Kylie for how well they've adapted to parenthood.

She said: ''It's amazing watching them and I think I can also now say, 'Now you can see how I did it, why I was feeling this way.'

''I think we just relate to each other and I think you never know how you're going to be as a mom, so watching them and how they're doing it - like, everyone has their own way. You really can't predict what you're going to be like. So I think just watching them is really, it's really special to see their journey.''

However, when she was asked which of the Kardashian-Jenner siblings would be next to have a baby, the TV personality remained coy.

She said: ''Oh, I don't know. I can't predict the future.''