Progesterone, also called progesterone, is an endogenous progesterone that is used in the clinical field of pets, mainly to guide animal breeding. It is produced by the female ovaries and plays a vital role in ovulation, maintaining pregnancy, initiating labor, and breast development.
Under what circumstances is it necessary to test “progesterone”? Assessing a dog’s estrus cycle.
Assess the dog’s estrus cycle, determine the best breeding period for the dog, and improve the breeding success rate; It is estimated that the progesterone concentration at the time of delivery is <1ng/ml, and the possibility of cervical dilation within 24 hours is 100%; for dog breeds prone to dystocia, adequate preparations for delivery must be made.
- Determine whether to use tocolytics
Progesterone can promote the development of endometrial glandular tissue and inhibit uterine muscle contraction, which is the “pregnancy protection” effect. The progesterone concentration needs to be greater than 1-2ng/mL to maintain pregnancy in dogs and cats. During normal pregnancy, the canine progesterone concentration is as high as 15-90ng/mL.
Assist in determining the sterilization status of female dogs.
Neutered female dogs have very low progesterone concentrations (<0.2ng/mL).
2. What is the important role of canine progesterone testing in dog breeding?
You should know that every estrus cycle of the same female dog is different. Factors such as the female dog’s age, physical condition, long-term living environment, and feeding habits will all have varying degrees of impact on the female dog’s estrus cycle.
Normally, a female dog will go into heat once before she is 1 year old. From now on, they will come into estrus twice a year, usually from March to May in spring and from September to November in autumn. Each estrus lasts for 5 to 12 days, with an average of 9 days and a few lasting up to 21 days.
The dog’s estrus cycle can be divided into the following four stages, namely proestrus, estrus, interestrus (also known as the “luteal phase”) and anestrus.
Animal estrus schedule.
If you want to increase the pregnancy rate of a female dog, it is not stable to judge the estrus cycle of the female dog only by experience. The progesterone test is currently the most advanced and accurate method. Combining experience with clinical testing can effectively Dadi improves the dog pregnancy success rate of female dogs and is also very helpful in the health care of female dogs and canine fetuses.
3. How does progesterone testing determine the best breeding period? Ovulation in female dogs generally occurs 48 hours after the LH peak, and it takes 48 hours for the eggs to mature after ovulation, so the optimal breeding period should be from the 4th to the 7th day after the LH peak appears.
However, the LH peak is narrow, appears quickly, and fades quickly, making it difficult to track. The rise in progesterone levels happens to begin after the LH peak occurs, so the best dog breeding time can be found by tracking changes in progesterone levels.