Preliminary repeated oocyte recovery by rectovaginal method in pregnant crossbred darreshuri mares

To evaluate the oocyte recovery rate through aspiration of follicle in pregnant mare by rectovaginal method, four healthy Darashuri mares were selected. Aspiration of follicles after pregnancy confirmation was carried out from 15 days to the end of fifth month of pregnancy in those palpable follicles. The rectovaginal method of oocyte aspiration posed no danger either to the mare or fetus even if it is repeated several times. The oocyte recovery rate was 13.64%. It appeared that the lifespan of well developed follicles during pregnancy was considerably short as they usually luteinized before reaching their maximum size. It is concluded that this method may be tried for oocyte recovery from pregnant mares.