Animals live in environments that are both complex and continually changing, so they have
to respond to short-and long-term variations in a wide range of factors, such as photoperiod …

The Fourth Edition of Knobil & Neill continues to serve as a reference aid for research, to
provide the historical context to current research, and most importantly as an aid for …

Change in metabolic status, defined as a change in the availability of nutrients and energy to
the tissues, is a powerful regulator of the reproductive function in small ruminants, especially …

Most bulls that are managed for sale as yearlings are fed high-energy diets in the post-
weaning period to maximize rates of gain in body weight. High-energy diets with adequate …

In mature male sheep and goats, changes in feed intake seem to have little effect on
gonadal endocrine function but induce profound changes on sperm production. These …

During early lactation, dairy cattle are in negative energy balance and the delay to first post-
partum ovulation depends on the time taken to recover from this situation. Lactating cows …

Holstein bull calves often reach artificial insemination centers in suboptimal body condition.
Early-life nutrition is reported to increase reproductive performance in beef bulls. The …

Orexins exert their effects through two specific receptors (OX1R and OX2R) that have been
found mainly in the brain and also in peripheral tissues of rats and humans. Here, we …

The chapter presents the nutritional requirements of ewes during conception and
pregnancy, as well as the effects of these reproductive stages on nutrient metabolism and …

The objective of this study was to examine the effect of dietary n-3 polyunsaturated fatty acid
(PUFA) supplementation of rams on semen quality and subsequent sperm function of liquid …