Postnatal Development of the Testis in the Mongolian Gerbil, Meriones unguiculatus

Autor:	Hiroyoshi Ninomiya, Tsunenori Nakamura
Rok vydání:	1987
Předmět:	endocrine system General Veterinary urogenital system General Medicine Biology Gerbil Epididymis General Biochemistry Genetics and Molecular Biology Testicular weight Andrology Seminiferous tubule medicine.anatomical_structure medicine Animal Science and Zoology Spermatogenesis
Zdroj:	Experimental Animals. 36:65-72
ISSN:	1881-7122 0007-5124
DOI:	10.1538/expanim1978.36.1_65
Popis:	The testicular development in gerbils was studied over 16-week periods starting from birth. Testicular weight and seminiferous tubule diameter increased considerably between 1 and 11 weeks of age. At 16 weeks the testicular weight was about 540 mg. Spermatogenesis commenced at about 2 weeks when mitoses first appeared in spermatogonia. Spermatozoa appeared in a few of the seminiferous tubules by 7 weeks and consistently so in all of the tubules at 10 weeks. Epididymal spermatozoa appeared first in the cauda epididymis at 10 weeks and were consistently present at 12 weeks. Formation of mature Leydig cells with a grouped perivascular arrangement appeared by 3 weeks and continuously so thereafter. From these results, it is evident that the male Mongolian gerbil is almost sexually matured by 10 to 12 weeks of age.
Databáze:	OpenAIRE
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