Swine estrous cycle The estrous cycle in the pig averages 21 days but can range from 17 to 25 days. The first day of standing heat, when the female is receptive to the male and will stand to be mounted, is referred to as day 0.
A: Goldfish mate by spawning. The female releases her eggs into the water, and the male releases his sperm to fertilize the eggs. Goldfish reach sexual maturity at approximately 1 year of age. The mating ritual of goldfish involves the male chasing the female and nudging against her to prompt her to release her eggs.
Swirl the sperm in the water and repeat the same process with the vent of the female, releasing her eggs. Swirl the water again to combine the sperm and the eggs. 1  Be very ginger with artificial insemination. 2  Your goldfish can bruise easily, so apply very light pressure when clearing their vents.