Several major groups of animals typically have readily distinguishable eggs.
The most common reproductive strategy for fish is known as oviparity, in which the female lays undeveloped eggs that are externally f… See more

All sexually reproducing life, including both plants and animals, produces gametes. The male gamete cell, sperm, is usually motile whereas the female gamete cell, the ovum, is generally larger and sessile. The male and femal… See more

The cycle of the egg's formation is started by the gamete ovum being released (ovulated) and egg formation being started. The finished egg is then ovipositioned and eventual egg incubation can start. See more