The eggs take roughly 19-21 days to hatch after being laid, and a female will lay an egg every 24-48 hours.
First things first-eggs should hatch in 21 days, though some may hatch a day or 2 early and some a day or 2 late, after the incubation period began.  Best Answer: Hi, Cockatiels in captivity generally lay between 3 and 8 eggs per clutch with the average being around 4 to 5 per clutch. The incubation period starts when the hen or pair start sitting on the eggs constantly. Some hens may wait until the 3rd egg to begin the incubation process, so all eggs will hatch close to the same time. Generally though, the hen will start incubating the eggs by the time she lays the 2nd egg. The normal incubation period for cockatiel eggs is between 18 and 21 days (from the day the hen or pair start sitting the eggs) Report Abuse. 18 to 21 days from incubation period. Sometimes the Cockatiel won't start incubating the eggs till she has two or three. So give a few more days. And don't worry if the parents are sitting on the eggs they know what to do. Leave them alone. And don't go into the nest. Some hens may wait until the 3rd egg to begin the incubation process, so all eggs will hatch close to the same time. Generally though, the hen will start incubating the eggs by the time she lays the 2nd egg. The incubation period starts when the hen or pair start sitting on the eggs constantly. Some hens may wait until the 3rd egg to begin the incubation process, so all eggs will hatch close to the same time. Generally though, the hen will start incubating the eggs by the time she lays the 2nd egg. The normal incubation period for cockatiel eggs is between 18 and 21 days (from the day the hen or pair start sitting the eggs). The male and female generally take turns sitting on the eggs and do this in shifts. Some pairs will divide the eggs and each sit on half of them.  18-21 Days after the birds start nesting. They will lay an egg then in 24 or 48 hours lay another. They will not sit on the nest constantly until their entire clutch has been laid. When they start sitting on the eggs the eggs will hatch in 18-21 days. Once the cockatiel pair mates, within a few weeks the female will lay eggs in the nestbox that you have provided for her. A female will lay anywhere between 2 eggs and 8 eggs. The eggs hatch anywhere from 18 days to 21 days after they are laid. You will know that the egg is ready to hatch if you notice it tilting. This happens because the air cell present in the egg begins to become large. As the oxygen content in the egg depletes, the chick uses its egg tooth to crack open the egg and emerge into the world. Another sign of the egg being ready to hatch is the pip mark on the shell surface. Once you notice the pip mark on the egg, the cockatiel egg will hatch within 24 hours to 36 hours. More Articles :
http://www.backyardchickens.com/a/how-to-incubate-hatch-eggs-just-21-days-from-egg-to-chicken https://answers.yahoo.com/question/index?qid=20080424121727AACO6rq https://answers.yahoo.com/question/index?qid=20080424121727AACO6rq https://answers.yahoo.com/question/index?qid=20071102130419AAX7N2Y https://in.answers.yahoo.com/question/index?qid=20070610111737AAR9AHE http://www.rocketswag.com/animal/birds/cockatiel/How-Long-Does-It-Take-For-Cockatiel-Eggs-To-Hatch.html
how long do cockatiel eggs take to hatch