Nightcrawlers produce an average of 38 cocoons per year, or roughly one every 10 days, in the right conditions. Each cocoon may create one or two earthworms, although manure worms have as many as 11 worms per cocoon. Bre... More »

A worm has a simple life cycle, as it starts inside an egg cocoon, hatches into a small worm, grows larger and becomes sexually mature, mates with another worm and creates egg cocoons. The cycle then repeats itself with ... More »

Earthworms reproduce through a unique copulation process whereby two worms line up against each other and excrete a type of mucous that forms a layer that encapsulate their bodies. Both worms release sperm into the mucou... More »

Segmented worms, or polychaetes, reproduce sexually or asexually, depending on the individual species. Some segmented worms possess either male or female sexual characteristics, while others are hermaphrodites, which mea... More »

Mice are fertile animals because female mice come into heat every four to five days. Their reproductive rate depends upon how often males and females actually mate. An average female mouse has 30 to 35 babies per year. More »

If a female is fertile, a male elephant will hover around her for a period of a few hours to a few days, mating on and off over that time period. A female elephant has a 4 to 6 week period where she is able to conceive, ... More »

Female cheetahs are polyestrous, meaning they ovulate several times per year, according to the Hoedspruit Endangered Species Center. The cheetah's estrous cycle, similar to menstruation in humans, is 12 days long, with o... More »