Materials (3) Estudios (3) Materiales (3) Dimethylformamide (2) Cattle (2) Attention (2) Ops (2) Dimetilformamida (2) Atención (2) Ganado vacuno (2) Ethylene glycol (1) Minors (1) Trials (1) Statistics (1) Spermatozoa (1) Semen (1) Research (1) Reproduction (1) Quality of products (1) Proportion (1) Poisons (1) Interest (1) Fountains (1) Fertility (1) Fees, Administrative (1) Evaluation (1) Etiquette (1) Chance (1) Cells (1) Attachment and garnishment (1)