Levels of methyl farnesoate in the blood and in vitro rates of methyl farnesoate synthesis by the mandibular organ were investigated to determine whether this compound is related to the differences in morphology and reproductive states of distinct types of male spider crabs described by Homola et al. (1992) in winter populations. Three male types, selected from a summer population, were investi...

Bumble bee pollinated Chamaecrista fasciculata provides pollen as the sole reward to its pollinators. Male sterility, expressed as an absence or nearly complete absence of pollen production, occurs in low frequency in populations of C. fasciculata. Here we describe experiments, using C. fasciculata, to examine frequently cited determinants of the spread and maintenance of male sterility: compen...

the present study was aimed to investigate the effect of fluoxetine on aggressive behaviors towards female and testosterone concentration of male fighting fish (betta splendens) during one reproduction event. male specimens were exposed 6 days to concentrations of 0 (control treatment) and 0.54 µg/l fluoxetine (exposed treatment) and aggressive behaviors of them assessed on different reproducti...

Background: Formaldehyde (FA) is a suspected reproductive toxicant, which may cause significant adverse effects on human reproductive system. Given to its widespread use in occupational setting, and more recently, in several industries related to construction and household products, everyone may be exposed to FA. This study was designed to determine the effect of FA and to investigate possible ...

BACKGROUND Anticancer agents induce a variety of adverse effects when administered to cancer patients. Busulfan is a known antileukemia agent. When administered for treatment of leukemia in young patients, busulfan could cause damage to the male reproductive system as one of its adverse effects, resulting in sterility. METHODS We investigated the effects of Korean Red Ginseng extract (KRGE) o...

Background: Male infertility refers to the inability of a male to achieve a pregnancy in a fertile female. The root of many causes of infertility is miscommunication between immune and reproductive system. Male reproductive system is very sensitive and vulnerable, infections can hinder maturation and movement of spermatozoa lead to impaired fertility.All species need an immediate reply to the m...

BACKGROUND Hyperglycemia can impair the male reproductive system in experimental animals and in men during reproductive age. Studies have shown that vitamin C has some good effects on male reproductive system, and therefore vitamin C treatment could attenuate the dysfunctions in this system caused by hyperglycemia. Thus, the objective of this work was to evaluate whether vitamin C treatment cou...

The reproductive toxicity of propoxur (2-isopropoxy-phenyl-N-methylcarbamate), a carbamate pesticide, was investigated in adult male Wistar rats exposed to 0, 1.73, 2.6, and 5.2 mg/kg body weight/day for 90 successive days. Results obtained from this study showed a significant (p < 0.05) concentration-dependent increase in food consumption, relative weights of testis, epididymis and kidneys wit...

Calcium (Ca) is a significant element that acts as an intracellular second messenger. It is necessary for many physiological processes in spermatozoa including spermatogenesis, sperm motility, capacitation, acrosome reaction and fertilization. Although influences of Calcium deficiency on sperm function and male infertility have been widely studied, mechanisms for these abnormalities are not wel...