STUDIES ON TESTICULAR DESCENT IN GADDI SHEEP FETUS

Title: STUDIES ON TESTICULAR DESCENT IN GADDI SHEEP FETUS

Authors: Parul Shukla and Rajesh Rajput

Source: Ruminant Science (2018)-7(2):251-254.

Cite this reference as: Shukla Parul and Rajput Rajesh (2018). Studies on testicular descent in Gaddi sheep fetus. Ruminant Science 7(2):251-254.

Abstract

The present study was conducted on sixty eight male Gaddi Sheep fetuses to determine descent of testes. After measuring crown rump length of the foetus, their age was calculated in days using the formula: Y = 2.74 X + 30.15. These fetuses were divided into 4 stages i.e stage I (31-60 days), stage II (61-90 days), stage III (91-120 days) and stage IV (121- till term). At 36 days of gestation, the testes were located posterior to mesonephric kidneys. The epididymal duct was visible adjacent to the testis on 45th day of gestation. The testes started descending into the inguinal canal on 83rd day of gestation and reached up to the scrotum on 95th day of gestation. The testes finally settled into the scrotum on 140th day of gestation. The shape of the testis varied from round to oval in stage I to oval in stage II and III and elongated in stage IV of gestation.

References

Arthur GH (1964). Wright’s Veterinary Obstetrics. 3rd Edn, Baltimore, Williams and Wilkins Co, P  475.

Baishya G and Vyas KN (1991). Studies on foetal testicular development in Surti buffalo (Bubalis bubalis). Indian Veterinar Journal 68:556-60.

Farooqui MM, Chandrapal and Prakash A (2011). Anatomical studies on the descent of testis in prenatal goat (Capra hircus). International Journal of Morphology 29:318-324.

Gall CF, Stier CH and Fraham K (1994). Age estimation of goat fetus. Small Ruminant Research 14:91-94.

Gier HT and Marion GB (1970). The Testis. In: Development, Anatomy and Physiology. Eds: AD Johnson, WR Gomes and NL Vandemark. Academic Press, New York. pp 2-28.

Harvey EB (1959). Placentation in ochotonidae. American Journal of Anatomy 104:61-85.

Hejazi S, Issabeagloo E and Taghizadieh M (2011). Study of testes development in sheep fetus. Advances in Environmental Biology 5:2750-2755.

Hughes IA and Acerini CL (2008). Factors controlling testis descent. Euopean Journal of Endrology 59(1):575-82.

Hullinger RL and Wensing CJ (1985). Testicular organogenesis in the fetal calf: Interstitial endocrine (Leydig) cell development. Acta Anatomica (Basel) 121:99-109.

Klonish T and Flower PA (2004). Molecular and genetic regulation of testis descent and external genital development. Development Biology. p 270.

Kumar R, Sharma AK and Prasad MC (1988). Morphometric study of caprine foetus. Indian Journal of Animal Science 58:928-31.

Pasquini C, Spurgeon T and Pasquini S (2003). Anatomy of Domestic Animals Systemic and Regional Approach. 10th Edn. Sudz Publishers, USA.

Patten BM (1948). Embryology of the Pig. New York, McGraw Hill Book Company. p 211.

Russe I and Sinowatz F (1991). Harn-und Geschlechtsorgane. In: Lehrbuch der Embryologie der Haustiere. Verlage Paul Parey. Berlin, Germany. pp 304-337.

Sharma A (2010). Study on prenatal development of epididymis in Indian buffalo (Bubalus bubalis). MVSc thesis submitted to GADVASU, Ludhiana, India.