Livestock production continuation relies upon efficient reproduction.

Most bodily functions are controlled by the endocrine system which uses chemicals and hormones (chemical messengers) that are released into the bloodstream from glands. Hormones control functions such as water retention, growth, metabolism, weight and reproductive functions. Over 20 main hormones are released and the major glands are the pituitary gland, hypothalamus, reproductive glands, thyroid, parathyroid, adrenal and pineal gland.
The focus of this paper is the endocrine system’s role in reproduction. Biologically each species’ main goal is to reproduce and continue the line. Without hormones this process would simply not exist and species would cease to exist.