Mare Services > Embryo Transfer Overview
Why Embro Transfer?
- To continue competing while obtaining offspring.
- Having an embryo from a mare competing can act as insurance for your mare
- Having an embryo from a mare competing could allow you to sell a mare at her peak while her bloodlines are preserved through the embryo.
- You would like more than one foal out of your mare in one year
- Your mare is aged or injured and cannot physically carry and/or deliver a foal. (NB younger mares are more fertile and deliver better quality embryos).
- To produce a foal late in the breeding season to allow the donor to remain open for an early start in the next breeding season.
Embryo Transfer Process
The process for retrieval of an embryo from your mare starts with a successful insemination and ovulation (see AI section). Seven to eight days after ovulation, the mare’s uterus and uterine tubes are flushed non-surgically. If the insemination was successful and the egg was fertilized, an embryo will be collected into a filter. From the filter, the embryo is retrieved, cleaned and prepared for transfer into a recipient (surrogate) mare. Around seven days after transfer, the recipient mare is tested for pregnancy. If the embryo remains viable, the recipient mare can then carry the pregnancy and deliver the donor mare’s foal. More than one embryo can be collected in a single flush if the mare has multiple ovulations. However, super ovulation cannot be induced in the equine species so multiple follicles must occur naturally.
Embryo Transfer Options
- Mare owner can bring mare ‘donor’ to QEC for set-up and artificial insemination (admission client mare form). The ‘donor’ is flushed 7 days after ovulation, and the embryo is transferred into a QEC recipient mare (Lease Agreement of QEC Recipient Mares For Embryo Transfer)
- ‘Donor’ mare (admission client mare form)can be set up (AI’d or live covered) at another vet then come to QEC seven days after ovulation for flush and embryo transfer into a QEC recipient mare (Lease Agreement of QEC Recipient Mares)
NB -this system can work but because QEC has not set up the mare, success rates are more variable
-QEC sees a higher percentage of dirty flushes from mares that have been live covered.
- Mare owner can have donor mare (admission client mare form) set up at another vet who flushes and transports embryo to QEC for transfer into QEC recipient mare (QEC Recipient Lease Form)
- Donor mare (admission client mare form) as well as recipient mares synchronized by another vet. Donor mare and recipients come to QEC for flush and transfer, QEC veterinarian selects the best recipient to put the embryo in.