How much times does a bird take for her eggs to be fertile?

A human egg is viable for conception for 12–24 hours. However, fertile cervical mucus is created for several days prior to ovulation which can enable sperm to live in the body for up to five days. Therefore, there are typically six days per cycle that can result in a pregnancy. read more

(Bird eggs vary in size from the tiny 0.2 gramme eggs of hummingbirds to the enormous 9 kilogram eggs of the extinct elephant bird.) Just as an aircraft cannot fly if it is overweight, all female birds must dispense with the fertile egg as soon as it is formed. read more

The male bird can be a different color; for instance, a pied cockatiel and a lutino cockatiel can make fertile eggs together. The female must have had sex with the male sometime in the week prior to laying her eggs. read more

If fertile chicken eggs are required, the cock should be replaced by a more vigorous bird. Occasionally infertility can be the result of an over-gallant male. These cocks take so much trouble over calling and looking after their hens at meal times, that almost all the food is pecked up by the hens before he gets a chance to eat himself. read more