Some observations on corrugated egg shells

Publisher Website
Google Scholar
Abstract
In a group of birds of the same breed, those laying eggs with the thinnest egg shell membranes (mg/cm2) were the most likely to produce corrugated shells. Furthermore, in series of eggs from individual birds, an increase in the degree of corrugation of the shell was accompanied by a thinning of the shell membrane as well as an increase in egg weight. Given the presence of a thin membrane, the greater the weight of the egg the greater was the chance that it would have a corrugated shell. Corrugations result from the deposition of shell on a corrugated membrane which is possibly caused by insufficient plumping of the egg or by the presence of weak areas in the membrane becoming distorted under pressure.