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.
Hummingbirds are attracted to brightly colored flowers, including yellow, orange, pink and purple, but they are attracted to red more than any other color, as red seems to be an indicator of food to these small birds. Planting a variety of brightly colored flowers, and including red, helps attract hummingbirds.