Contents Melatonin is a ubiquitous molecule, present in a wide range of organisms, and
involved in multiple functions. Melatonin relays the information about the photoperiod to the …

Background Some breeds of sheep are highly seasonal in terms of reproductive capability,
and these changes are regulated by photoperiod and melatonin secretion. These changes …

We recently demonstrated the presence of melatonin in ram seminal plasma and differences
in its concentration in this fluid between the breeding and nonbreeding season. In this study …

Contents The effect of melatonin implants administered during non‐breeding season in
Rasa Aragonesa rams on sperm motility parameters and other reproductive traits was …

In mammals, the pineal hormone melatonin is the most powerful pacemaker of the master
circadian clock and is responsible for reproduction in seasonal breeders. It is also well …

Melatonin is an indole-like neuroendocrine hormone. A large number of studies have shown
that melatonin can improve production performance of ewes, but it is not clear in lambs. In …

Governed by melatonin, ovine reproductive seasonality limits production outcomes due to
periods of decreased reproductive efficiency. Though it is established that slow-release …

Goat bucks are seasonal breeders that show variation in sperm quality, endogenous
melatonin (MLT), and presumably in the expression of MLT receptors on the sperm …

The aim of this study was to analyze the effect of melatonin implants, during the non-
reproductive season, on the content of melatonin, testosterone and 17-β estradiol levels …

The present study analysed the involvement of melatonin, acting via its receptors (MT1 and
MT2), in ram sperm functionality. Indirect immunofluorescence assays revealed no changes …