Para evaluar el control de la ovulacion, a traves de tres protocolos de sincronizacion en inseminacion artificial a tiempo fijo, sobre el porcentaje de prenez y su correlacion con el hematocrito y el perfil metabolico, se seleccion 30 vacas lactantes del Valle de Sibundoy, departamento del Putumayo, Colombia. En el T1 se aplico un implante subcutaneo con 3 mg de norgestomet mas 5 mg de valerato de estradiol y al retiro, nueve dias despues, se aplico 150 mg de D-Cloprostenol y 500 UI de gonadotrofina corionica equina. En el T2 se aplico un implante intravaginal con1,3 gde progesterona mas 2 mg de benzoato de estradiol y al retiro, 7 dias despues, se aplico 150 mg de D-cloprostenol y 24 horas mas tarde 1 mg de benzoato de estradiol. Para el T3, se aplico el mismo implante mas 2 mg de benzoato de estradiol y al retiro, 7 dias despues, se aplico 150 mg de D-cloprostenol, 48 horas mas tarde 10 mg de acetato buserelina. Todos los animales fueron inseminados 54 horas despues de retirado el implante y el diagnostico de prenez se hizo a los 35 dias de la IATF. Se utilizo un modelo de Regresion Logistica y correlacion de Pearson. El grupo de vacas del T2 presento una tasa de prenez del 70% superior (p<0,01) a los demas tratamientos, en razon a que el aumento en la concentracion sanguinea de estradiol promueve el mecanismo de “feedback” positivo que finaliza en la secrecion de LH. El porcentaje de prenez se encontro altamente correlacionado con los niveles sericos de hematocrito (r=0,0854), a su vez este hematocrito se correlaciono negativamente con el colesterol (r=-0,367) y el fosforo (r =-0,090), probablemente como consecuencia de la sintesis de esteroidal y sus efectos. EVALUATION OF THREE SYNCHRONIZATION PROTOCOLS AND THEIR CORRELATION WITH THE METABOLIC PROFILE IN COWS OF SIBUNDOY, PUTUMAYO ABSTRACT For evaluating control of ovulation through of three synchronization protocols in FTAI and their correlation with hematocrit and the metabolic profile, is identified 30 lactating cows of Sibundoy Valley, Putumayo state, Colombia. In the T1 is applying a subcutaneous implant containing 3 mg norgestomet plus 5 mg of VE and retirement, 9 days applied, of 150 mg D-cloprostenol and 500 IU of eCG. In T2, intra vaginal implant was applied with 1.3 g progesterone plus 2 mg of BE and removal within 7 days applied of 150 mg D-cloprostenol and 24 hours after 1 mg of BE. For T3, we applied intravaginal implant with 1.3 g progesterone plus 2 mg BE and removal within seven 7 days, applied of 150 mg D-cloprostenol and 48 hours after 10 mg Buserelin acetate (GnRH analogue). All animals were inseminated at 54 hours after implant removal and pregnancy diagnosis was determined by ultrasonography at 35 days after FTAI. The results were expressed in percentage of pregnancy and their analysis used a logistic regression model included in the SAS statistical package, with Pearson correlation. The T2 group presented a higher pregnancy rate of 70% (p<0.01) than the other treatments, that due to the increase in blood levels of estradiol promotes the mechanism of feedback positive ending LH secretion. The pregnancy rate is highly correlated with serum levels of hematocrit (r=0.0854), in turn, this hematocrit is negatively correlated with cholesterol (r=-0367) and phosphorus (r=-0.090), probably as a result of steroid synthesis and effects. Keywords: ovulation, pregnancy, hematocrit, metabolic profile