Postnatal Developmental Anatomy of Testes and Epididymis of Gaddi Goats

Abstract

SUMMARY:The study revealed that the testes of one-day-old Gaddi goats have descended in the scrotum along with adnexa. They were elongated compressed latero-medially and became ovoid during their postnatal growth and morphogenesis. The two testes were not different significantly in their weight and measurement. The average weight which was about 2.9 gm at birth grew to 107 gm (40X) in pubertal animals and nearly maintained it during the post-puberty (113 g). The mean length (1.46 cm), width (0.85 cm) and thickness (0.62 cm) also grew by 47, 60, and 83 times, respectively. In post-pubertal animals it measured 7.06 x 5.20 x 5.10 cm. The study indicated a very fast growth of the testes from birth to puberty, which did not alter significantly after that. A relatively much faster growth in thickness and width over the length was the reason behind the change of the morphology from more elongated shape at birth to ovoid shape on maturity. The mediastinum testis was grossly discernible in the testis even at birth. Epididymis was identifiable into caput, corpus and cauda. The gross linear mensuration of these components did not differ in the caput and cauda regions on either side, whereas the length of corpus was more on the left side in all age group of animals. The growth curve revealed a continuous growth of all segments, but the fastest growth occurred in the early postnatal life (at 12-18 month age).

Biometrical and histomorphometrical changes of testis in the dynamics of postnatal ontogenesis from birth to puberty of Black Bengal goat

“…Moreover, testicular weight did not alter significantly from birth (day 0) to 1 month of age ( p > 0.05), but from 2 months until puberty (6 months), it greatly increased ( p < 0.05). The biometrical results of the current investigation are congruent with those of earlier studies (in Yiling goats by Bo et al [ 14 ]; in Gaddi goats by Pathak et al [ 13 ]) in goats. The findings of the current investigation concur with those of Sadi and Gofur [ 16 ] in indigenous sheep and Gofur et al [ 17 ] in indigenous bulls.…”

“…In particular, it has been claimed that testicular size or weight is a reliable predictor of sperm production in the present and the future in a variety of animal species [ 2 ]. With increasing age, the biometrical values of the Black Bengal goat testis in the current study greatly increased, which supports previous observations [ 12 , 13 ] in different documented goat breeds. We observed that the testis development of the Black Bengal goat was slower in the early postnatal phase and quicker between 4 and 6 months of age, around the time when spermatogenesis starts.…”

“…The findings of the current investigation concur with those of Sadi and Gofur [ 16 ] in indigenous sheep and Gofur et al [ 17 ] in indigenous bulls. We also found some inconsistencies with previous studies; testicular size and weight were less than those seen in West African Dwarf bucks by Olurode et al [ 18 ], Gaddi goats by Pathak et al [ 13 ], and higher than those in Black Bengal goats by Kabiraj et al [ 19 ]. Breed variances, the physical condition of the selected goats, agroclimatic conditions, nutritional level, housing, and other management or experimental procedures could all contribute to the discrepancies.…”

Histological Study of Rete Testis and Ductuli efferentes of Rabbit (Oryctolagus cuniculus)

“…According to Adebayo et al (2010), epididymis is an epithelial tube consisting of five segments, namely: the initial segment, head, corpus, cauda, and vas deferens. Epididymis serve as a source of nutrients for sperm maturation (Pathak et al, 2014).…”