The kiwi fruit is a rich source of Vitamin C, which is something I'm trying to have more of.
I don't usually like the green type of kiwifruit - the golden ones are great and always sweet but with the green ones, sometimes you end up with very tart ones that are just too puckering sour for me.
So using them in juices are great - I sometimes blend them plain with some simple syrup and ice.. and sometimes with a bottle of Yakult.
Kiwis are full of Vitamin C, low in calories, high in anti-oxidants and is a very good source of folic acid. They are also good for digestion because they contain an enzyme called actinidin, which helps to digest proteins. This makes kiwis a form of natural laxative, very helpful for the sluggish preganancy digestive system that causes constipation.
For some reason (and I think it's because of actinidin), some people advise against pregnant ladies having kiwis.