We’re constantly told that too much fat in our diet is bad for the health of ourselves and our animals. However it now seems that very particular types of fats are implicated in determining not only animal health but their reproductive performance. Here Dr Robert Abayasekara and Prof Claire Wathes of the Department Of Veterinary Basic Sciences at the RVC explain their work demonstrating the effect of different polyunsaturated fatty acids (PUFAs) on human and animal fertility.