Kiwi like many fruits need to be stored in the fruit until ready to sow. When ready to sow, you have to put them in potting mix in the fridge for like 3-4 months and then leave out at room temp. They are a pain to try to germinate. In my opinion, this is one plant that is better left to buy a start of. If you want to try anyway, you would get a mix of male and female seedlings.
Remy

Thank you so much for the information, Remy. It's a good thing I learned this before I started saving them! :-)