This experiment was aimed at examining the effects of vitamin E on the fertility of Coturnix quail. The fertility was measured on three levels: the number of eggs laid by the hens; the hatch rate of their eggs; and the motility of the sperm of the cocks. Three groups of birds were used: a control group that received only normal feed; a group (A) in which the males alone received the vitamin E supplement; and a group (B) in which both males and females received the vitamin E. supplement. In comparing the motility of the sperm by examination under a microscope, it was observed that Groups A and B were improved slightly. Considering that the mobility was measured visually, this slight improvement will have to be verified by further testing.. The area that showed a noticeable and important improvement was that of the laying and hatch rate of Group B, in which the hens also received the vitamin supplement. In addition, it was observed that all of the birds receiving the vitamin E showed superior feather condition. This is significant, but it may point to two possible conclusions. It is apparent that the vitamin E improved the general health of the birds that received it. This may have itself caused the improvement in fertility indirectly. The other possibility is that the vitamin E actually influenced the fertility. I propose to continue this experiment and in the following year I will use more advanced techniques to measure sperm motility. This may yield an answer to the question.