Field Tests of Artificial Inseminationwith Frozen Semen on Cows with History of Reproductive Disorders

Abstract

A total of 192 cows were examined. They gave a conception rate of 63.0 per cent and included 95 cows suffering from reproductive disorders. These cows received necessary treatment and 49 of them (76.0 per cent) became conceptive when inseminated with frozen semen.
Fifty-seven cows were injected intravenously with HCG for treatment of disorders in the ovarian function and then subje cted to insemination with frozen semen As a result, they exhibited a conception rate of 70.2 per cent.
Four cows remained infertile in spite of insemination with frozen semen when they had undergone uterine irrigation and medication on the following day of insemination or prior to estrus for the treatment of vaginitis and endometritis.