We at Hedrick English Bulldogs offer in house progesterone testing - a must for ovulation timing female bulldogs for breeding.
The visible signs of heat and breeding time (such asvulval swelling, end of vaginal discharge, or flagging) are only an approximate indication of the time of ovulation. These signs can vary by more than a week. Ovulation is triggered by the Luteinizing Hormone or LH which peaks two days before ovulation. Progesterone levels begin to rise at the same time as the LH surge. Ovulation occurs two days after the initial rise in progesterone. Predicting ovulation is done accurately by detecting the initial rise in progesterone. After ovulation occurs, the ovocytes take 2-3 days to ripen, making the most fertile period 5-6 days after the initial rise in progesterone. The relationship of the hormones, progesterone and LH, to ovulation and to the fertile period is shown in the figure. With the TARGET Canine Ovulation Timing kit, it is possible to detect the initial rise in progesterone.
There are several circumstances in which artificial insemination may be the best way of delivering semen to the bitch. Where all relevant factors are known and normal, in small and medium sized breeds of dogs, a conventional artificial insemination is, in my opinion, likely to be 100% successful. However, the caveat here - that all other conditions are known and normal - is a substantial one. This presupposes that both the dog and the bitch are clean of any infection, that they are under 5 years of age, that their hormonal function and fertility are normal, and the dogs are sound. If any of these factors is other than stated, the likelihood of success of any breeding activity, whether artificial or not, is reduced.
The valid reasons for using artificial insemination include the following:
The most frequent circumstance in which an artificial insemination is requested, is when the stud dog doesn't wish to breed the bitch on a given day. The fact that it is day 10, or 12 or 18 of the bitch's season is often the basis for the breeder deciding that this is the correct day for the breeding. It may be thought to be the time that "all" bitches of this particular breed are most receptive; it may be the day, counting back from a prior litter, that the most effective breeding was done. It may be that for reasons of time constraints of the people or the dogs involved, show commitments, travel opportunities, and so on, it is desirable to try to cover a period of three or four days when it will be impossible for the two to mate, even though it is likely to be early. Sometimes, less frequently, it is done toward the end of true estrous, when the dog's interest, once again, has dropped to a less than willing level, and due to the generally held belief that the later breedings are most likely to yield a litter, or a large litter, so one last attempt is desired.
Hedrick English Bulldogs also offers complete breeding services for your approved AKC female English Bulldog - this service includes: