The control of oestrus and ovulation in sheep has been researched for more than 3 decades and still continues. Both in South Africa and abroad, much research has been done on the use of intravaginal progestagen sponges alone (Robinson, 1967; Van der Westhuysen, Van Niekerk & Hunter, 1970; Hunter, Belonje & Van Niekerk, 1971) or with Pregnant Mare Serum (PMS) (Boshoff, 1972; Le Roux, 1974). Attention has also been given to the use of orally active progestagenes (Southcott, Braden & Moule, 1962; Hulet, 1966) and more recently prostaglandin F2: (Fairnie. Cumming & Martin, 1976; Greyling, Van der Westhuysen & Van Niekerk, 1979; Greyling & Van der Westhuysen. 1979). The practical acceptance of these techniques depends on the success achieved in relation to the financial cost and labour input. These techniques have been developed to alleviate problems that arise in farming practice and the results or a series of experiments on various techniques of synchronisation and artificial insemination are reported here.
"Experientia docet" - Experience is the best teacher