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.
Trending Now. Answers. Best Answer: The Goldfish eggs should hatch in two or three days depending on the temperature of the water in your tank. First it is important to realize that the eggs must be fertilized by a male Goldfish, after the eggs have been laid by a female Goldfish.