The role of oestrogens in male reproductive tract physiology has for a long time been a subject of debate. The testis produces significant amounts of oestrogenic hormones, via aromatase, and oestrogen receptors (ERs)alpha (ESR1) and ERbeta (ESR2) are selectively expressed in cells of the testis as well as the epididymal epithelium, depending upon species. This review summarizes the current know...

Experiment 1 evaluated pregnancy rates (PRs) when estradiol cypionate (ECP) replaced the second GnRH injection of a timed artificial insemination (TAI) protocol for lactating dairy cows. Cows were pre-synchronized with two injections of PGF2α (Lutalyse r , Pharmacia Corp., 25 mg; i.m.) given to multiparous cows (n=170) at 40 ± 3 and 54 ± 3 d postpartum (dpp) and to primiparous cows (n=201) at 6...

This definition continues for four pages, at the end of which one still does not know what the Coordinative Conditions are, but one begins to grasp their enormity. As a biologist I am appalled, not only at the concept of a series of alegbraic conditions that will be capable of expressing biological coordination from the atomic to the societal levels, but also at the amount of factual informatio...

*Correspondence: Maria De Falco, Section of Evolutionary and Comparative Biology, Department of Biology, Via Mezzocannone, 8 80134 Naples, Italy e-mail: [email protected] Endocrine disrupting chemicals (EDCs) are identified for their ability to perturb the homeostasis of endocrine system and hormonal balance. The male reproductive system is under close control of hormones and each change in th...

the inability to have a child is a baleful event for millions of couples in their life, and a large percentage of them have a personal frustration. the problem of infertility in couples is distributed equitably between the two sexes. among different methods, medicinal plants have been used in many nations to treat male infertility problems. these medicinal herbs are used to treat sperm disorder...

As genetic factors can hardly explain the changes taking place during short time spans, environmental and lifestyle-related factors have been suggested as the causes of time-related deterioration of male reproductive function. However, considering the strong heterogeneity of male fecundity between and within populations, genetic variants might be important determinants of the individual suscept...

Investigations were made into the body condition, energy metabolite and endocrinal changes of male green turtles Chelonia mydas prior to and during their vernal breeding period in the southern Great Barrier Reef. Prior to migration, breeding males exhibited a higher body condition index than non-breeding males. However, during the migratory reproductive period, breeding males lost significant b...

After spermatogenesis, testicular spermatozoa are not able to fertilize an oocyte, they must undergo sequential maturational processes. Part of these essential processes occurs during the transit of the spermatozoa through the male reproductive tract. Since the sperm become silent in terms of translation and transcription at the testicular level, all the maturational changes that take place on ...

background:   objective: to determine knowledge of hormone therapy (ht), reproductive physiology, and menopause in a population of 40-60 year old women.   materials and methods: this cross-sectional study was conducted through a cluster sampling among 330 women in yazd, islamic republic of iran, in 2010. data was collected using a questionnaire containing questions about reproductive physiology...