Serological Studies on the Artificial Insemination of Domestic Fowl:V. Fluctuation of Sperm Agglutinating Antibodies in the Serum and Fertility in the Hens Following Successive Inseminations

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The present experiments were undertaken to elucidate whether the sperm agglutinating antibodies in the serum of hens increase following the successive artificial inseminations, and if the agglutinins affect the fertility of the hens.1. Following the successive inseminations, the number of the hens which possessed sperm agglutinins and the titer of agglutinins increased. However, some hens already possessed the agglutinins before the inseminations, and the titer was found to increase with age. These facts suggested that the increases were not exclusively attributable to the successive inseminations.2. The following regressive formulas and correlation coefficients existed between the sperm agglutinin titer (X) in the serum and the fertility of eggs of the hen (Y) in two poultry farms.Y=-4.89x+77.22, r=-0.27 (n=32, at Y Farm)Y=-2.55x+67.16, r=-0.30 (n=80, at K Farm)The coefficients of correlation were statistically significant at 5% level, but not so high that it was difficult to determine that the cause of low fertility after successive inseminations in the practical field was due to the increase of sperm agglutinins.
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