Background: The goal of this study was to confirm the effects of the engineering design of the vaginal progesterone implant capsule, which had a 2 cm sponge with a diameter of 5 cm, a 2 cm porous capsule with a dose of 50 mg MAP in the centre and 13 cm nylon cord for keeping the sponge in position. Methods: A full concentrate total protein 17% consumed at 0.05 kg/day/head was previously administered to as many as 30 overweight ewes with a body score of at least 3 and those who were positively identified as having ever given birth to help them improve their body score condition. It was found that T0 consisted of 10 obese female sheep that underwent a normal oestrous cycle without oestrus synchronization therapy and waited for natural oestrus, while T1 and T2 consisted of 10 sheep that received progesterone implant capsule vaginal sponges with a dose of 50 mg MPA on day 0 getting 100 IU sc PMSG folligon intervet Holland in addition. Result: On day 35, the oestrous response was 100% and the pregnancy rates were 70%, 80% and 80% in T0, T1 and T2 groups, respectively (p greater than 0.05). Progesterone levels in the groups non pregnant are 1,66±0.8; 1,23±0.78 and 1,60 ± 0.90 ng/ml (p greater than 0.05).