
Temporal trends in bull semen quality: A comparative model for human health?
Keywords: DES، diethylstilbestrol; Ejaculate volume; Semen quality; Sperm concentration; Sperm morphology; Sperm motilityAI, artificial insemination; DES, diethylstilbestrol; EDC, endocrine disrupting chemical; GLM, general linear modeling; MLR, multiple linear regression