Donating eggs will not deplete your own egg supply quicker. Every cycle, about 15-20 eggs mature inside follicles. However, usually only one follicle reaches maturity and release an egg for ovulation; the rest stop growing and are discarded by the body.
In an egg donation cycle, medications are given to fully develop all of the eggs that naturally mature in a cycle. We don’t remove any more eggs than what the body naturally creates for that cycle.