N°1 insemination center in France Services

GOOD REASONS TO USE EMBRYO TRANSFER :

• To allow certain mares to produce offspring when they cannot carry their foals themselves,
• To avoid putting an older mare or a mare with a long racing career and who has never foaled at risk of pregnancy,
• To accelerate genetic progress by breeding young mares while continuing to test them in competition, thus allowing for faster assessment of the quality of their offspring.
• To increase the production of a mare whose quality warrants it.

We ourselves often use embryo transfer and have thus produced, among others: Eloïse de Semilly (World Equestrian Games Jerez 2002) and Kalaska de Semilly (Beijing Olympics 2008) by the excellent, now-aged Normandy Night; Right Now Semilly (Vice-Champion of the 4-year-old CIR at Lion d’Angers 2009) by our mare who competed in CSI, Jaffna de Semilly; Rock’N Roll Semilly (French 4-year-old Champion 2009) from the Oriele de la Mare line; …

At a time when embryo transfer centers are springing up everywhere, the advantages that distinguish the Semilly Stud Farm are:

♦ SKILL

The Semilly Stud Farm has been performing embryo transfers for over twenty years. Pioneers in this field, we have acquired expertise and technical skills that result in the highest success rates in Europe, thus guaranteeing you great efficiency.

♦ SERIOUS

Working in collaboration with an independent organization, we can guarantee the traceability of your embryos.

The surrogate mares are rigorously selected to optimize gestation conditions. We choose healthy, young mares, preferably those that have already foaled once, and of sufficient size and build. They are primarily trotters and saddle mares. They are fed high-quality forage and supplemented judiciously to maximize the success rate of embryo transfers. Once confirmed pregnant at more than 21 days of gestation, the surrogate mares are turned out to pasture in rich Normandy grazing lands to promote embryo implantation and healthy development until they leave the mare’s care at more than 45 days of gestation.

We manage a group of 250 surrogate mares, which increases the chances of successful transfers by providing a wide range of cycled mares compared to donor mares.

♦ FLEXIBILITY

We offer our clients a wide range of procedures depending on the constraints they may have with their mares:

• Some of the surrogate mothers are kept under heat lamps during the winter to allow breeders to start early in the season (as early as January for the first cycled donors). We also allow breeders to continue quite late in the season if they wish to perform an embryo transfer after the competition season (sometimes until November).
• Inseminations can be carried out at the Semilly Stud Farm or at another center.
• Collections can take place at the Haras de Semilly or in another center by our transfer team or by a third party who sends us the collected embryos.
• The carriers can be loaned or sold.

♦ GUARANTEE

We offer a guarantee from 45 days of gestation up to 48 hours after the birth of the foal.

For more detailed pricing and terms, you can download a transfer contract or contact us directly by phone or email: contact@semilly.com

DO YOU WANT TO CARRY OUT YOUR TRANSFERS WITH YOUR CARRYING CAR? 

⚠️ We strongly advise breeders against attempting embryo transfers with a single surrogate mare, as this requires extensive monitoring to synchronize the two mares (donor and surrogate). This is costly, burdensome for the donor, and on average, the results are not great. There are always exceptional cases where it works on the first attempt, but on average, there are far more cases where breeders struggle throughout an entire season, manipulate their mares with hormones that ultimately disrupt their natural rhythms, require a significantly higher number of embryo transfers, and end up paying more than if they had simply rented a surrogate mare… and all this often leads to nothing… except two mares that no longer respond to anything and whose heat cycles are of poor quality.

If we have been managing a group of 250 broodmares for over 20 years, it is not for pleasure, and even less so for the cost of maintaining such a large stock of mares. It is because it is the key to success.

This allows us to monitor donor mares during natural heat cycles, without having to manipulate them hormonally. In the long term, this is very important for them because we are seeing more and more mares arriving at our farm in desperation because they have stopped producing. Often, we manage to recover by letting them function more naturally again, but sometimes when the system is too disrupted by multiple hormonal injections, the cases become hopeless!

While renting a surrogate mare does represent a cost for the breeder, at least they know what they’re getting into and only pay if they obtain a confirmed pregnant mare at 45 days of gestation with a Live Foal Guarantee, unlike attempts to synchronize two mares. It also maximizes their chances of achieving a successful embryo transfer under good conditions, and above all, it’s a long-term investment to ensure a reliable supply of embryos for several years (look at the number of transfers we’ve performed with Rock’n Roll’s dam, who never carried a foal herself but gave birth to around fifty foals. If we had given her repeated hormonal injections, she would have produced far fewer!).

Tai di San Patrignano, a filly by Weihaiwej, the blue-eyed World Champion ridden by Franck Sloothak, and Le Tot de Semilly, conceived by embryo transfer by Richard Levallois, foaled in 2001 at Haras de Couvains and enjoying the rich Normandy pastures with her surrogate mother shortly before leaving to join her owners in San Patrignano, Italy.

THANK YOU to the many breeders from all over Europe who have already placed their trust in us!

• Some by bringing us internationally renowned mares such as: Quenelle du Py, Aranka (2009 French Champion), Belladona, Birdy d’Opal, Caluma de Rhuys, Circée d’Helby, Diam’s, Diane du Landey, Dictée, Dody de Chalusse, Eisha For Ever, Elue de Saint Siméon, Etincelle de Moens, Etoile du Château, Etornella, Etoupe II, Eve des Etisses, Flèche du Plessis, Flo Jo, Floralie’Jac, Hirondel du Marais, Idylle du Thot, Infante des Chênes, Infinie Rivage, Intrépide du Vallon, Jaffna de Semilly, Jalna Pierreville, Jumpy de Kreisker, Kassandre Erger, Kiss Mi des Nauves, Latina, Licorne d’Or, Midinette Deux, Mo Chroi (1st in the Dublin Horse Show Grand Prix), Nicoméa, Olympia, Osyris, Patchouli’t Kesterbeekbos, Qerly Chin, Quanagra, Quieva du Marais, Quina des Bruyères, Rienza des Loups, Unie d’Espoir, Vinca Major, Wanda, the world champion Weihaiwej, the crack pony Grace Pondi, etc.  ;
• Others entrusted us with some of the best French broodmares, such as: Aventure II, Azalée de Mai II (dam of Hermès Saint Lois), Bébé du Château, Betty de Kreisker (dam of Jumpy de Kreisker and Fakir de Kreisker), Calbonny (dam of Mozart des Hayettes), Calliope de Rieux (dam of Niack de l’Abbaye), Déesse des Vaux, Degina, Demie Lune, Dirka de Revel, Ecume du Chatillon, Eden du Rozel, Emblème du Plessis, Energie d’Auzay (sister of Galet and Hermine d’Auzay), Gekas des Forêts, Hirondel du Marais, Infinie Rivage, Iroise de Grandry, Jaina de Beaufour, Jolie Narcotique, Jolly Girl de Kervec, Karma de Nantuel, Kiss Me des Joncs, Marilyn des Hayettes, Mesange du Rouet (dam of Baloubet du Rouet), Noblesse de Thurin, Origine d’Elle (mother of Gold du Talus), Razzia de Revel (full sister of Quidam de Revel), Revangika (sister of Krishna), Rosière du Rozel, Roxelane III (mother of Le Prestige Saint Lois), Quolombia, Sabelle des Loups, Shannon (mother of Elkintot), Trophée de Prissey (mother of Idéal de Prissey), Voltige du Pas (mother of Fétiche du Pas), etc.