Progesterone profile, ovarian response and embryo recovery in prostaglandin F2 alpha and syncro-mate-B in combination with folltropin treated crossbred cows

Crossbred cows (16) were divided into PGF2 alpha and SMB groups. Prostaglan din F2 alpha and syncro-mate-B were used to induce oestrus and superovulate d with folltropin. The embryos were collected non surgically. The number of ovulations, embryo recovery and transferable embryos were significantly hi gher in PGF2 a group and the number of nontransferable embryos were signifi cantly higher in SMB. group. The progesterone concentration on the day of i nitiation of superovulatory treatment, on the day of PGF2 alpha administrat ion and on the day of embryo collection was significantly higher in PGF2 al pha group, while the progesterone concentration on the day of superoestrus and on day 3 post superoestrus did not show any significant difference. The progesterone concentration registered an increasing trend between FSH inje ction in PGF2 a group and not in SMB group. in both the groups the progeste rone concentration on the day of superoestrus, on day 3 post superoestrus a nd on the day of embryo collection is significantly positively correlated w ith number of ovulations, embryo recovery and transferable embryos. But the progesterone concentration on the day of initiation of superovulatory trea tment and on the day of PGF2 alpha administration (during super ovulation) is positively correlated with number of ovulations, embryo recovery and tra nsferable embryos only in PGF2 alpha group not in SMB group. Therefore, the progesterone concentration on the day of initiation of superovulatory trea tment and on the day of PGF2 alpha administration (during super ovulation) dan be used as tool only in PGF2 alpha group and cannot be used as tool in SMB group to predict the ovarian response, embryo recovery and quality of e mbryos in crossbred cows.