This study aimed to identify the mechanism(s) for impairment of spermatogenesis in adulthood in rats treated neonatally with estrogens. Rats were treated (days 2-12) with 10, 1, or 0.1 microg diethylstilbestrol (DES), 10 microg ethinyl estradiol (EE), 10 mg/kg of a GnRH antagonist (GnRHa), or vehicle and killed in adulthood. DES/EE caused dose-dependent reductions in testis weight, total germ c...

Introduction: Our aim was to evaluate effects of hemicastration in immature rabbits on the histology of the contralateral testis after puberty. Materials and Methods: Eighteen immature male rabbits were randomly divided into two groups. The first group underwent right or left hemicastration and the second, sham operation. After their puberty, the rabbits underwent the second operation. In the f...

The study examined the reproductive indices of albino and normal pigmented Clarias gariepinus fish from Katsina (KT) Yola (YY), carried out under hatchery condition. experiment compared fecundity, testes, milt volume, percentage fertilization hatchability (AA) (NN) (YY). Normal C. had highest number eggs (229,240), followed by YY (127,250) least was recorded in Albino (124,750). weights lengths...

AIM To estimate and compare pubertal growth timing and intensity in height, Tanner stage markers and testis volume. SUBJECTS AND METHODS Data on height, genital stage, breast stage and pubic hair stage, testis volume and menarche in 103 boys and 74 girls from the Edinburgh Longitudinal Growth Study were analysed. The SITAR model for height and a novel mixed effects logistic model for Tanner s...

AIM To determine the limitations of a punched-out orchidometer in practical use, we compared with a scrotal ultrasound (USG). METHODS A total of 281 testes from 142 males were examined using both a punched-out orchidometer and a USG. The volume differential between both methods was calculated and expressed as orchidometer/USG volume (O/U ratio). Distribution of the O/U ratio was determined an...

Unilateral orchidectomy (UO) is required when further breeding potential is important. It is sometimes necessary to remove a single testis in a matured stallion for therapeutic reasons. In this study, twelve donkeys were used to evaluate three techniques of unilateral castration, histological and morphological changes on the remaining testis. Results of the study showed that each of the surgica...

Two hundred and fifty biopsy specimens from the contralateral testis in patients with unilateral germinal testicular cancer were analysed by light microscopy for carcinoma-in-situ changes. Changes were found in 13 (5.2%) patients. One-third of patients with an atrophic contralateral testis (volume less than or equal to 12 ml) and one-fifth of patients with a history of cryptorchidism had change...

Laparoscopy, both diagnostic and therapeutic, has been used in the management of pediatric non-palpable testes. We report a case of left non-palpable testis at the unusual age of 18 years. Laparoscopic exploration revealed an intra-abdominal testis lying between the internal inguinal ring and external iliac vessels. The testis was visually in good condition and, in contrast to the accepted proc...

The first volume of the Endocrine Function of the Human Testis overviews the feedback system between the testis and the central nervous system. The testis secretes androgens which act at the hypothalamus and pituitary to modulate secretion of hypothalamic releasing factors and pituitary gonadotrophins. LH and FSH influence testicular androgen secretion and sperm formation. This volume is the pr...