Development stages and morphological characteristics of total of 179 bovine ova, non-surgically collected 8 to 9 days after estrus from 39 donor cattle superovulated with PMSG or FSH and Prostaglandin F₂α, were investigated under the phasecontrast microscope, and the following results were obtained. 1. Of 179 ova non-surgically collected from superovulated 39 donor cattle, 24(13.4%) were unfertilized. 2. Development stages of embryos at collection were ranged from morula (30.7%) to blastocyst (49.2%) or hatched blastocyst (6.7%). 3. In the morphological grading of 155 fertilized embryos, excellent, good, fair and poor embryos were 42(27.1%), 44(28.4%), 59(38.1%) and 10(6.4%), respectively. 4. The results described above suggest that the dosage of PMSG (3000IU) and the time of collecting embryo (8 to 9 days after estrus) adapted in this experiment were too much and late to get high percentage of morphologically excellent embryo.