In this issue, Kimmel et al. bring clarity to the question of whether bent long bones, scapulae, and wavy ribs should be considered to be malformations or variations, with an incisive review of the literature.
This issue of BDRB contains a paper by Chapin et al. describing a primary epididymal cell culture and its application to the study of inflammatory potential of new drug candidates. It also contains a review by Dietert describing the development and significance of the microbiome in early life.