Answer: Even a self-fertile Kiwi can slough off their fruit soon after it appears the fruit
is starting to develop. This kind of stuff can happen if the flower is not completely pollinated. The self-fertile forms of kiwi have both male and female flowers but it still takes a bee or wind to transfer the pollen from the male flower to the female. I think what you are seeing is the result of incomplete fertilization in which the flower had a male flower nearby to pollinate but not enough pollen to pollinate the flower, thus a fruit can start to develop on the vine but it will quickly be sloughed off. We can see this same kind of thing with some fruit and nut trees when a pollinizer is not nearby. The plant may outgrow this (or you won't notice because there will be so many fruits that you'll lose track of the number it drops), or you may want to place or plant a male form near your vine and see if you can improve on the number of fruit that will set.
Hope this explains things for you!
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