The increasing of cattle number from livestock ecosystems is a major objective in achieving feeding security of the human population. By the same time, the sustainable development of livestock is tightly linked to the protection, conservation and development of human useful animal species...

Livestock production (milk, meat) depends heavily on reproductive activity, leading to scientific research and practice to find ways to optimize growth and livestock operation in order to achieve maximum economic efficiency. Research work in cattle reproduction, especially in family farms, are...