If you know the mare's fertility and ovulatory status, you can better gauge a stallion's fertility. These records are primarily used to determine fertility and find out when a mare will be ovulating. If the mare is not appropriately healthy or ovulating, then even high quality sperm may not impregnate the mare. Records allow you to track if a stallion is unable to produce healthy embryos from his sperm.
It can also help you determine whether a stallion is naturally fertile or if he is having quality issues. Since these records help you determine heat detection, breeding, pregnancy determination, and veterinary treatments that may assist. Since many of these are to directly assess the mare, these records may give some insight as to whether the issue lies with the mare or stallion when it comes to creating healthy embryos. Understanding the mare's quality of heat and how receptive she is, may also make it easier to breed the stallion to her.
Carefully kept records allow you to breed the mare at the optimal time, making the stallion's sperm more likely to be successful at creating progeny at the correct time. Since you are also watching the health of the mare at this time, you can mediate her issues, keeping a record of anything that affects her fertility and keeping that in mind when breeding her with stallions. Palpation and ultrasound records can be maintained on the mare which may give insight into later issues if any arise. In the meantime, it can help ensure the correct timing is made for breeding, to ensure she is appropriately ovulating in a healthy way.
Stallion records that detail live cover may give some indication of the stallion's fertility, but a better indicator of the stallion's fertility may be the results of a Semen evaluation records. These records detail semen volume, concentration, morphology, and motility and give you a snapshot of the stallion's quality that day. Although these records are only used with artificial insemination they are still a good indicator for the stallions participating in such a program. This is what allows you to determine the semen volume necessary for artificial insemination. Motility is measured by microscope, concentration by spectrophotometer and the sperm are assessed. If you keep a record each day, you can determine how much semen the stallion produces on average through the breeding season. You can determine how many mares can be booked. If there are any changes in how much or the quality of the semen, you can address any health issues that may be causing them.
Since the goal is to breed and birth live foals, so there are a few methods to determine if the desired rates are being reached. You can calculate pregnancy rate to see if the program is being effective. You can run this calculation for one ovulatory period or on the total breeding season depending on your needs. This is when you use the following calculation:
Pregnancy rate = (number of successful pregnancies/total pregnancies) x 100 = percentage% pregnant.
The number of cycles per pregnancy may be valuable:
Number of cycles per pregnancy = [(number of mares that took 1 heat cycle x 1) + ( number of mares that took 2 heat cycles x 2) + ( number of mares that took 3 heat cycles x 3)] divided by total number of pregnancies.
Next, you can determine the life foal rate. Since this is the goal, this is an important number!
Foaling rate = (mares that produced foals / total number of mares X 100) = percentage of live foal rate%.
There are other calculations to determine the pregnancy loss rate, embryo loss rate, fetal loss rate, and stillbirth fetal loss rate. Since stallions may contribute to embryotic loss, these numbers are important to watch carefully.
These figures help determine whether a mare is most likely to conceive when bred. It helps to determine which mares should be bred. Since the manager can determine her breeding status better, pregnancy rates will go up, which looks good for mare, breeder and stallion! The records indicate and stress the production of live foals. Since the information should be easy to understand, access and maintain, the stallions breedability will increase.
A better understanding of him and the mares will let the manager determine how the breeding process will best work out. The ability to cross reference and see the other information (such as the mare information, palpation record etc.) which will help with assessing mare and stallion fertility. Since the goal is to record information, it should be accurate. With large farms, computers may even be considered. The ability to manage many horses on a large scale helps. Most people cannot remember all the details of breeding and having your own record on hand will make breeding faster, simpler and easier with less stress or overwork or overbreeding on the stallion.
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