Hello,
Everyone has an opinion. Experience adds value to the opinion.
Here is mine:
As a disclaimer, allowed in this section, I am a breeder.
90-95% of EBD are made by AI and 90-95% are delivered by C-Section. Certainly this is not new for most Bullie breeders.
How the AI is done gets to be a science. There are 3 main ways ( not counting natural ) was of creating pregnancies. Vaginal, trans-cervix and surgical.
The other factor is whether the sperm is fresh, cooled, frozen.
I have used the cytology method for years. I have two of my own studs so collecting at the day they were ready was never an issue. For the past few years I only used vaginal AI. Starting early on checking slides is critical. Since estrous happens differently, waiting the same number of days to breed is not practical. I have had several liters using this method.
Now I have a better vet. This vet clinic is very cutting edge, at least compared to my other vets?
Here is the method I am now using:
Instead of cytology, I am using progesterone testing. This is MUCH more exact. Blood testing is the best exact method of knowing when.
Taking a baseline blood reading BEFORE they come into heat, determines what the reading is. Most likely close to zero. Once the heat cycle starts I start checking at 5 days. Possibly to early, but each of my females progress differently. I take a blood sample every other day to know EXACTLY when to breed. Yes, this is very costly. The blood test costs me $100 each. I would rather pay this money then to miss a breeding. I missed one in early February by possibly 1-2 days. My "other" vet said I should wait to check again. When I checked, she was at a 9.5 I was breeding to an outside male so I have to contact and get a shipment. They couldn't get to the vet that day, went the next day, shipped. When I bred her, I had another blood test done on that day. She was at a 15.
Breeding needs to be done starting at 4.0 and above. If you are using fresh, breed 2 days in a row, skip a day and then a third time. This places sperm possibly 24 hours early prior to ovulation. Since sperm lives for 72 hours, this coverage allows for several days of possible coverage.
Using the trans-cervix is VERY successful. Less evasive than surgical and equally as successful. The scope is inserted with a camera that can see the cervix. The pipet is inserted past the cervix and the semen is planted spot-on! The amount of semen that is used is only 3ml. This is the amount that can be held in the cervix.
Using a vaginal AI, more is used, but a large portion of the fluid is not able to transverse the cervix. Thus AI trans-cervix allows for a more concentrated volume. The shipped semen is spun down to separate and then a fresh extender is added to make up a 3 ml does.
This method not only has a VERY high success rate, why this is better, is the NUMBER of puppies from a liter is higher than average. Why have a liter with only 1-3 when 7-9 can be produced for the same investment?
Maybe too much, maybe too technical?
Good Day~