[QUOTE=MissingASock;8956678]
And here lies my question of why? Why would someone use frozen over fresh?
I get that if a stallion is over seas that frozen would be the only way to go for for that instance. But if you had the option from, hypothetically, a somewhat local stallion who offered both frozen and fresh- why pick frozen?
What would make a mare not suitable for frozen? And why would you now choose to do frozen over fresh?[/QUOTE]
You are asking good questions, but I would also suggest picking up a book on the subject and/or checking out equinereproduction.com articles.
In a nutshell, statistically with large numbers, you have a higher likelihood of conception with fresh. I don’t remember the exact data. Of course there are fresh stallions with bad motility and frozen stallions with rocket fuel and so on. Morphology, motility, sperm count, handling during shipping, etc. can all influence conception as can timing, breeding protocol, mare inflammation, uterine quality or issues, etc. The reality is that the veterinarian has a huge influence on your success with frozen (also the mare). I have a vet clinic I used where I never did get a conception with frozen, and the other vet I have used has a great success rate. Some of the difference has to do with how frequently they are willing to ultrasound, who is doing the ultrasounds and breeding (what level of oversight does the vet have and how much is delegated) and how they monitor and treat the mares post breeding.
Why frozen over fresh then–assuming equal stallions? Well it is often a cheaper stud fee (although there are risks, as you may give up a live-foal-guarantee). Second, you can order multiple doses and have them on-hand, ready-to-go and only pay one shipping fee–this really adds up with multiple mares. Some fresh stallions are only offered on M-W-F, or have a limited season due to competition.
Edited to add: Anecdotally, my maiden mare’s foal this year was from frozen. She caught on the second try (switched clinics though, so it was the second vet’s first try). The first mare I bred was with fresh, but it took three tries.
I have had seasons where I never got a foal (fresh or frozen). Breeding can be quite expensive. This year my foal had surgery! I’ll stop now…