THE problem of obtaining a high percentage of fertile eggs is of prime importance to both poultry farmers and hatcherymen. Fertility is considered as total actual reproductive capacity of the female and male expressed by their ability, when mated together, to produce individual offspring. It is a common experience that many females are occasionally sterile even with good males. However, the male plays the dominant part in fertility rather than the females (Munro, 1946). Fertility is influenced by genetical, physiological and social factors. Certain relationships between fertility and semen characteristics are found. There is significant negative correlation between the percentage of abnormal sperms and fertility (Raimo, 1943; and Sampson and Warren, 1939). Cocks are sterile when producing semen with high abnormal percentages over 25 percent (Sampson and Warren, 1939). Motility of sperms is positively correlated with fertility (Allen and Champion, 1955; Raimo, 1943; and Shaffner and Andrews, 1948). There is…
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Gamal A.R. Kamar (1960) studied this question.
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