Buscar
Mostrando ítems 1-10 de 6790
Infertility of autoimmune origin in a stallion.
(1990-03-01)
Exocrine glands of Schwarziana quadripunctata (Hymenoptera, Apinae, Meliponini)
(2001-12-01)
This article describes the location, anatomy, histology and ontogeny of adult Schwarziana quadripunctata exocrine glands. These glands appear either as individualized organs (salivary gland system and Dufour gland) or as ...
Does the male reproductive performance depend on the early lactation milk in rats?
(1996-01-01)
This study investigated the role of the early lactation milk (ELM) on the male reproductive performance and the participation of GnRH on this effect in Wistar rats. Newborn males were divided into three experimental groups: ...
Fertility of male adult rats submitted to forced swimming stress
(Associação Brasileira de Divulgação Científica (ABRADIC), 2003-05-01)
We investigated whether stress interferes with fertility during adulthood. Male Wistar rats (weighing 220 g in the beginning of the experiment) were forced to swim for 3 min in water at 32ºC daily for 15 days. Stress was ...
Breeding activity of the neotropical treefrog Hyla elegans (Anura, Hylidae)
(1996-12-01)
Breeding of Hyla elegans was monitored from August 1991 to July 1992 at a temporary pond in Ubatuba, State of Sao Paulo, southeastern Brazil. Males began to call as they entered the chorus, and defended their calling sites ...
Effect of immunocastration on sex glands of male Mangulica (Swallow-bellied Mangalitsa) pigs
(Brazilian Journal of Animal Science, 2023)
The effects of male age on sperm DNA damage in an infertile population
(2007-11-01)
The objective was to investigate the influence of age on sperm DNA damage. Semen samples were collected from 508 men in an unselected group of couples attending infertility investigation and treatment. DNA fragmentation ...
Neonatal inhalatory anesthetic exposure: Reproductive changes in male rats
(2002-12-01)
We investigated the effects of an inhalatory anesthetic (ethyl ether) during the neonatal period of brain sexual differentiation on the later fertility and sexual behavior of male rats. Animals were exposed to ethyl ether ...
Ultrastructural study of the lateral lobe of the prostate of Wistar rats submitted to experimental chronic alcohol ingestion
(1998-01-01)
Alcoholism is considered today one of the most serious social and medical problems. Different investigators have demonstrated that chronic exposure to alcohol causes morphological and physiological changes in the testes ...