Graves T K, Hansel W, Krook L
Department of Pathology, New York State College of Veterinary Medicine, Cornell University, Ithaca 14853.
Cornell Vet. 1991 Jul;81(3):277-94.
A Holstein fetus was delivered by Caesarean section at a gestational age of 441 days. The pituitary pars distalis was aplastic and the adrenal and thyroid glands were severely hypoplastic. Arrested or retarded cartilage cell maturation resulted in absence or minimal development of epiphyseal ossification centers, delayed ossification of carpal bones, and arrest of longitudinal growth of bones. The pathophysiology of prolonged gestation and of skeletal pathology is discussed.
一头荷斯坦奶牛胎儿在妊娠441天时通过剖宫产娩出。其垂体远侧部发育不全，肾上腺和甲状腺严重发育不良。软骨细胞成熟停滞或延迟导致骨骺骨化中心缺失或发育极小、腕骨骨化延迟以及骨骼纵向生长停滞。本文讨论了妊娠期延长和骨骼病理的病理生理学。
