My Zucchini Fruit Does Not Mature

Question

The fruit becomes two to three inches long, dark green and looks good, then turns yellow and then white and dies.

Answer 1

It is a pollination issue. These articles will help:
https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm
https://www.gardeningknowhow.com/garden-how-to/beneficial/insect-pollination-process.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/pollinate-squash-by-hand.htm