[Survey on pregnancy rate in synchronized dairy cows by selectsynch]

ABSTRACT

To evaluate pregnancy rate in synchronized dairy herd by Selectsynch procedure and PG. Experimental Study. Three hundred and seventy four dairy cows were randomly allocated to three groups selectsynch, synchronized with PG and spontaneous heat. All cows were cleaned at day 30 after parturition and allocated to the following groups synchronization by select synch- insemination [n=139], synchronization by PG- insemination [n=125] and natural heat-insemination [n=110]. Pregnancy was diagnosed at days 42-50 after insemination. Chi-square test. For these methods pregnancy rate were 54 percent, 44.8 percent and 46.4 percent, respectively. Moreover there were not any significant difference among them. Since selectsynch made an acceptable pregnancy, it can be recommended for dairy herds