L' insemination artificielle bovine: reproduction, amelioration genetique.

animal breeding artificial insemination beef cattle bovin bovin de boucherie bovin laitier breeds bulls cattle ciclo estral comportamiento sexual comportement sexuel conservation du sperme cows cycle oestral dairy cattle diagnostic de gestation embryo transfer fertilization france francia ganado bovino ganado de carne ganado de leche mejoramiento animal oestrous cycle oestrus induction pregnancy diagnosis progeny testing pruebas de descendencia race razas reglamentaciones regulations reproduction selection semen semen preservation sexual behaviour sperme taureau toro transferencia de embriones vaca vache