The diploid germ cells that have the potential to develop into ova are called oogonia. In humans, all of a female's oogonia that she will make in her lifetime are created when she's still a fetus and hasn't even been born yet.
How do hummingbirds reproduce? To attract hummingbirds to a garden or feeder, rich, bright colors should be used. Red is known to attract hummingbirds from afar but does not have to be the sole color used. Hummingbirds like both annuals and perennials, as long as the colors in the flowers are vibrant.
The best way to attract hummingbirds is by putting out a feeder with nectar. Nectar is basically sugar water, and allows the hummingbirds to maintain the energy levels they need to catch insects. There are also many plants that you can add to your garden or yard to increase your chances of attracting hummingbirds.