In order to carry out this procedure the Donor mare is mated or inseminated and the precise time of ovulation is ascertained by regular ultrasound examination of her ovaries. The Recipient (one of your own mares or a mare from the Clinic’s pool of recipient mares) must be at the same stage of her reproductive cycle (ovulated within two days of the Donor mare’s ovulation).
Seven days after the time of the donor’s ovulation both mares (Donor and Recipient) must be brought to our Fertility Clinic. There the uterus of the donor mare will be flushed out using a special embryo flushing medium. This flushing medium is recovered from the uterus, filtered and examined under the microscope for the embryo.
Once found, the seven day embryo (which at this stage is no more than ¼ mm in size and barely visible to the naked eye!) is checked for normality, specially prepared by washing and then transferred to the uterus of the recipient mare.
The recipient mare can then be ultrasound scanned 6-7 days after the procedure to confirm pregnancy (at which time the embryo will be 5-15mm in diameter). Further ultrasound scans are usually advised to check for normal development of the pregnancy.