SUMMARY

We are researchad couses reduce fertility and methods of supresion to 100 milk cow, imported in area Sipovo. We tired overhaul fragmetly couses sterility and to appraised a few characteristics reproduction. We are gynecologycal exsemined cows: 1 lt 15 days post partum and also we 21 to 30 days. Cows with deranged reproduction treated with 4% lotagen, vit. AD3E and PMS. Whill we induction and synchronization of estrus we did aplication CLOPROSIN-G. Animals nutrition was inadequate at farmers what was efect significant reproductive problems. To research results was expected. We are to heal endometritis (83,3%), degeneration and afuction owary (81%). Appear estrus after inductin and sihronisacion estrus was 75%. After as that 61 head was pregnancy.

          Key words: deranged reproduction, animals nutrition, estrus, artifical insemination, pregnancy.