Fig. 2From: Decreased eggshell strength caused by impairment of uterine calcium transport coincide with higher bone minerals and quality in aged laying hensDifferences in the eggshell ultrastructure of hens laying eggs with different eggshell breaking strength. A Images of eggshell vertical profiles in high (HBS) and low (LBS) eggshell breaking strength groups under a scanning electron microscope. B Results of the eggshell ultrastructural characteristics. TT, total thickness; ET, effective layer thickness; MT, mammillary layer thickness. Data represent means with standard deviation based on 12 replicates with 5 eggshells each. An asterisk (*) indicates a significant difference (P < 0.05) between groupsBack to article page