Citation Fraser AC, Cusack M, Solomon SE & Bain MM (1999) Material properties, ultrastructural integrity and protein chemistry of broiler breeder eggshells. British Poultry Science, 40 (sup001), pp. S24-S26. https://doi.org/10.1080/00071669986648
Abstract First paragraph: In recent years UK broiler breeder flocks have fallen short of their genetic potential in terms of hatch-ability, with the most marked shortfall in reproductive performance occurring during the end-of-lay period. While the reasons for this are likely to be multifactorial, a well structured eggshell must play an important role in terms of embryonic survival and subsequent chick viability. Matrix proteins are an integral component in the production of the eggshell and any decline in their synthesis and transport within the oviduct will have serious repercussions for the developing chick.
Journal British Poultry Science: Volume 40, Issue sup001
Fraser, Alex C; Cusack, Maggie; Solomon, Sally E; Bain, Maureen M