scholarly journals Daily sperm production and evaluation of morphological reproductive parameters of Murrah buffaloes in an extensive breeding system

2012 ◽  
Vol 2 (2) ◽  
pp. 88-93 ◽  
Author(s):  
Patrícia A.C. da Luz ◽  
Cristiana Andrighetto ◽  
Paulo R.S. Santos ◽  
André Jorge ◽  
Maria Vitória P. Constantino ◽  
...  
Keyword(s):  
Breeding System ◽  
Reproductive Parameters ◽  
Sperm Production ◽  
Murrah Buffaloes ◽  
Daily Sperm Production ◽  
Extensive Breeding

Prolonged deleterious effects of neonatal handling on reproductive parameters of pubertal male rats

2006 ◽  
Vol 18 (4) ◽  
pp. 497 ◽  
Author(s):  
Renata Mazaro ◽  
Teresa Lúcia Lamano-Carvalho
Keyword(s):  
Sertoli Cells ◽  
Seminiferous Tubule ◽  
Male Rats ◽  
Germinal Epithelium ◽  
Reproductive Parameters ◽  
Sperm Production ◽  
Neonatal Handling ◽  
Epithelium Thickness ◽  
Cauda Epididymidis ◽  
Daily Sperm Production

The purpose of the present study was to investigate the long-lasting effects of neonatal handling on reproductive parameters of male rats. Neonatal handling (pups separated from their mothers, kept isolated at environmental temperature for 20 min and submitted to 1 min of tactile stimulation) was applied from post partum Days 1 to 14 (a stress-hyporesponsive period, SHRP) and the animals were killed at puberty (61 days of age). The number of mature spermatids and the daily sperm production were estimated in homogenates from the right testes and cauda epididymidis. Histometric parameters (diameter of seminiferous tubule, germinal epithelium thickness and number of Sertoli cells) were evaluated in paraplast sections of the left testes. The association of the slightly aversive stimuli applied during the SHRP proved to have lasting deleterious effects on male reproduction, causing lower testicular weight and reduced values of seminiferous tubule diameter and germinal epithelium thickness at puberty, which resulted in a 25% reduction in the daily sperm production and in the number of mature spermatids. Similarly, the number of Sertoli cells per tubular cross section was 20% smaller and the weight and number of spermatozoa were reduced more than 40% in the cauda epididymidis of animals handled.

scholarly journals Number and function of Sertoli cells, number and yield of spermatogonia, and daily sperm production in three breeds of boar

Reproduction ◽  
1996 ◽  
Vol 107 (1) ◽  
pp. 137-149 ◽  
Author(s):  
O. E. Okwun ◽  
G. Igboeli ◽  
J. J. Ford ◽  
D. D. Lunstra ◽  
L. Johnson
Keyword(s):  
Sertoli Cells ◽  
Sperm Production ◽  
And Function ◽  
Daily Sperm Production

scholarly journals Knockout of Murine Mamld1 Impairs Testicular Growth and Daily Sperm Production but Permits Normal Postnatal Androgen Production and Fertility

2017 ◽  
Vol 18 (6) ◽  
pp. 1300 ◽  
Author(s):  
Mami Miyado ◽  
Kaoru Yoshida ◽  
Kenji Miyado ◽  
Momori Katsumi ◽  
Kazuki Saito ◽  
...  
Keyword(s):  
Sperm Production ◽  
Testicular Growth ◽  
Daily Sperm Production

scholarly journals Determination of Daily Sperm Production (DSP) in Rabbit (Oryctolagus cuniculus) Bucks using Testicular Parameters

2015 ◽  
Vol 5 (4) ◽  
pp. 141-148
Author(s):  
Olumuyiwa Joseph Olarotimi ◽  
◽  
Olujide Adedamola Sokunbi ◽  
Abdur-Rahman Abdullah ◽  
◽  
...  
Keyword(s):  
Oryctolagus Cuniculus ◽  
Sperm Production ◽  
Daily Sperm Production

Effect of mouse epidermal growth factor on fertility in rams

1990 ◽  
Vol 41 (6) ◽  
pp. 1147 ◽  
Author(s):  
BW Brown ◽  
PE Mattner ◽  
BA Panaretto ◽  
GH Brown ◽  
BD Gream ◽  
...  
Keyword(s):  
Body Weight ◽  
Survival Rate ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Post Treatment ◽  
Sperm Production ◽  
Teratogenic Effects ◽  
Progressive Motility ◽  
Epidermal Growth ◽  
Daily Sperm Production

Seminal characteristics and flock fertility were studied in Merino rams treated with mouse epidermal growth factor (EGF). Intravenous infusions of 105 8g EGF/kg body weight over 24 h in five rams had no statistically significant effect on daily sperm production measured from 6-10 weeks after dosing or on the percentages of spermatozoa that were unstained (nigrosinleosin stain) or morphologically normal. At 7-8 weeks post treatment, the percentage of spermatozoa exhibiting progressive motility was significantly reduced (P<0.05). By 9-10 weeks after treatment, the seminal characteristics were normal in all rams. In 1987, eight rams and in 1988, six ofthe same rams, were joined with ewes for 6 weeks (at a rate of 2%) 12 weeks after s.c. injection of 150 8g/kg body weight. Compared with the performance of control rams, EGF had no significant effect on ram fertility, nor did it produce any teratogenic effects in their progeny or effect their survival rate.

INHIBIN BIOACTIVITY IN HUMAN TESTICULAR EXTRACTS

1987 ◽  
Vol 115 (2) ◽  
pp. R9-R12 ◽  
Author(s):  
B.J.B. Simpson ◽  
C.G. Tsonis ◽  
F.C.W. Wu
Keyword(s):  
Plasma Concentrations ◽  
Pituitary Cell ◽  
Untreated Group ◽  
Testicular Function ◽  
Sperm Production ◽  
The Mean ◽  
The Relationship ◽  
Daily Sperm Production

ABSTRACT Inhibin bioactivity was measured in human testicular extracts by a sensitive sheep pituitary cell bioassay. The relationship between testicular inhibin bioactivity, daily sperm production (DSP) and plasma concentrations of FSH, LH, testosterone and oestradiol were examined. The mean level of testicular inhibin bioactivity was 4.4 ±1.3 U/g (mean ± SD) with a significantly lower value in those who received radiotherapy (3.2 ± 1.4 U/g) than in the untreated group (4.8 ± 1.1 U/g). In contrast to the rat, human testicular inhibin bioactivity was not significantly correlated to FSH or DSP. These findings suggest that inhibin may have a complex role in normal and/or pathological testicular function.

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