The objectives ol this study were to determine the effect of PRID (Progesterone Releasing Intravaginal Device) on heifers and cows with anoestrus and suboestrus. Eight heifers and 12 cows were inserted a PRID for 10 days. A single injection of 500 mcg Cloprostenol. PGF2 alpha analogue, on the day removal of PRID. All animals inseminated three times at 48, 72 and 96 h following removal of PRID. Pregnancy rate in animals with anoestrus and suboestrus were 81.8 % and 62.5 % respectively, while onset of the oestrus occurence in animals with anoestrus and suboestrus were 91.7 % and 100 % respectively. The onset of the oestrus and pregnancy rates in all animals that PRID application were 95.0 % and 73 6 % respectively. The findings indicate that the use of PRID is effective for treatment of animals with anoestrus and suboestrus.