A team of scientists from Texas A&M University and the University of Glasgow Veterinary School in Scotland has discovered that naturally occurring endogenous retroviruses are required for pregnancy in ...

The regulation of seasonal reproduction in sheep is intricately linked to the actions of melatonin, a hormone whose secretion varies with the photoperiod. Central to this process are the melatonin ...

BOISE (CN) - A federal sheep experiment in Idaho threatens the teetering population of Yellowstone grizzly bears, environmentalists claim in court. The U.S. Sheep Experiment Station (USSES), ...

In Australia only 5 per cent of sheep are bred using artificial insemination New research hopes to increase the conception rates in ewes from frozen sperm The anatomy of the sheep's reproductive ...

1. Fitness costs of reproduction are expected when resources are limited. Costs drive the evolution of life-history strategies and can affect population dynamics if females change their allocation of ...

SCIENTISTS in Scotland who have produced the world's first clone of an adult animal were last night accused of ''monstrous'' conduct. The author of the book, The Genetic Revolution, made a fierce ...

Researchers from the University of Sheffield, as part of an international team, have discovered the secret of why dark sheep on a remote Scottish Island are mysteriously declining, seemingly ...