Decreasing clear eggs and infertility

Hatching eggs represent a high value and are expected to deliver chickens. However not all eggs are fertile and not all fertile eggs allow the embryo to develop into a quality chick. What are the issues to look at when hatchability is to far below the number of eggs set?   This article can also be found at World Poultry Volume 22 number 2. To view the article online simply click on the link below.   Keywords: eggs, incubation embryo, hatchability   Join