Influence of lactation on endocrine-metabolic status and on ovarian activity after calving in high yielding dairy cows. 1: Endocrine and metabolic changes during 50 days after calving

acide gras acidi grassi blood composition blood plasma blood sampling cholesterol ciclo estral ciclo estrale colesterol colesterolo composition du sang composizione del sangue cycle oestral dairy cows fatty acids glucocorticoides glucocorticoidi glucocorticoids glucosa glucose glucosio hormonas de la tiroide hormonas pituitarias hormone hypophysaire insulin insulina insuline lactation lattazione milk yield oestrous cycle ormoni tiroidei pituitary hormones plasma sanguin puerperio puerperium rendement laitier rendimiento lechero thyroid hormones trigliceridi triglyceride triglycerides urea uree vacas lecheras vacche lattifere