Malmgren L, Rodriguez-Martinez H, Einarsson S
Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Zentralbl Veterinarmed A. 1996 May;43(3):169-79. doi: 10.1111/j.1439-0442.1996.tb00442.x.
Twenty peripubertal Swedish cross-bred boars were used to study the testicular differentiation and the maturation of spermatozoa (epididymal) between 100 and 180 days of age. In all animals the sex cords were small and solid at 100 days of age. Spermatogenesis started at approximately 115 days of age and was completed, i.e. the cellular organization of the seminiferous tubules indicated a sexually mature testis with normal spermatogenesis, at 180 days of age. By 125 days of age only a few spermatozoa were found in the cauda epididymidis Furthermore, a high frequency of sperm morphological alterations were seen. The sperm concentration in the cauda increased with increasing age, and simultaneously the frequency of abnormal spermatozoa decreased. However, not all boars had a 'mature' semen picture in the cauda epididymis at 180 days of age.
选用20头青春期前的瑞典杂交公猪，研究其100至180日龄之间睾丸的分化及精子（附睾内）的成熟情况。所有动物在100日龄时，性索细小且坚实。精子发生大约始于115日龄，并在180日龄时完成，即生精小管的细胞组织表明睾丸已性成熟且精子发生正常。到125日龄时，仅在附睾尾发现少量精子。此外，还观察到精子形态改变的高频率情况。附睾尾中的精子浓度随年龄增长而增加，同时异常精子的频率降低。然而，并非所有公猪在180日龄时附睾尾的精液情况都呈现“成熟”状态。
