ABSTRACT
The effect of norgestomet ear implant plus PMSG used for induction of estrus in non-cycling buffalos on serum progesterone and blood biochemistry was investigated. Eighteen Egyptian buffalos were divided into two groups. Group 1 [control] included 10 buffalo-cows with cyclic ovaries, they received no treatment. Group 2 [treated] included 8 buffalo-cows suffering from ovarian inactivity, received norgestomet ear implant for 9 days plus 1000 IU PMSG on day 9 of implantation. Blood samples were collected for assaying progesterone, total proteins, albumin, globulin, Ca, P, Mg, copper, zinc, glucose and cholesterol during estrus phase and day 7 postestrus in both groups. The analysis of data indicated that treatment with norgestomet + PMSG significantly [P <0.01] increased Ca, Mg and cholesterol during estrus and total proteins, albumin, Ca, Mg and cholesterol significantly [P <0.01] increased during diestrus, whereas, inorganic phosphorus and zinc were significantly [P <0.05] decreased, while copper and glucose significantly [P <0.01] decreased during estrus than that of control. In addition, during diestrus serum progesterone, copper and glucose were significantly [P <0.01] decreased by treatment. In conclusion, reduced fertility following norgestomet treatment may be associated with decreased inorganic phosphorus, zinc, glucose with higher Ca, Mg and cholesterol during estrus and low progesterone, copper and glucose with higher total protein, albumin, Ca, Mg and cholesterol during diestrus phase