Answer: There are a number of reasons for premature fig drop; lack of pollination is the most common, environmental = cool/wet/hot conditions; insufficient water; too much nitrogen fertilizer. Or, the figs could have been invaded by a pest. Cut one of the fallen fruit open to see if there is a grub or wormlike critter inside. Without knowing what kind of fig tree you're growing, I can't recommend a pollinizer.
Hope this information will help you determine just why the fruits are dropping off.
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