Today again our topic is related to reproduction. Some time ago, Associate Professor Stanimir Yotov from the Thracian University explained to us the essence of estrus synchronization and why we often have to apply it in the reproductive process in our herds.

In the future, in a series of interviews with specialists in the field of reproduction, we will try to acquaint you with various schemes and methods of estrus synchronization, applied at home and abroad.

Our guest is Dr. Krassimir Kolev. He is a veterinary specialist with many years of experience, who has been successfully representing the pharmaceutical company Ceva Animal Health for over a decade. He has completed a number of international qualification courses for hormone therapies and other ruminant diseases in developed livestock countries such as France, Spain, Italy, Germany and Romania.

Today he will tell us about a universal and often used method for synchronizing estrus.

– Hello, introduce yourself in a few words.

– Hello, my name is Krassimir Kolev and I am a veterinarian by education. I graduated from the Thracian University in 2001, after which I practiced under the then system for almost 10 years as a district veterinarian. To this day I continue to practice the veterinary medical profession in an outpatient clinic in the town of Banya, Karlovo municipality. At the same time, I am an expert on ruminants at Seva Animal Health Bulgaria, a subsidiary of the pharmaceutical giant CEVA Santé Animale, headquartered in Bordeaux, France.

I am extremely grateful that during our 10-year cooperation with Seva Animal Health Bulgaria the company invests in my ideas and in many specializations abroad, which gave me invaluable experience and the opportunity to be maximally useful in my work today.

– Let’s talk about estrus synchronization. How can farmers choose the right solution for their farm? Is this practice only applicable to large farms?

– Regarding the application of methods for accelerated fertilization, or as they have gained mass popularity – estrus synchronization, it is good to know from farmers that they are an extremely effective opportunity for timely insemination of animals and hence to improve the efficiency of the farm. Unfortunately, many of them, especially in small and medium-sized farms, often underestimate this possibility. They underestimate it because there are different synchronization methods with different degrees of complexity, which often prevents them from using them.

However, there is a method of synchronization that is different and can be applied to farms of any type. It is considered universal and even some experts informally define it as “the golden key to improving fertility.”

This is the application of the so-called progesterone devices or also known as vaginal IUDs. These devices are suitable for heifers and cows of dairy and beef breeds. They are applicable both to cyclic (in which the ovaries work) and non-cyclic animals. This is what makes the method universal.

We also know that cows with higher milk productivity are bred later than others. The reason for this is the lack of progesterone due to the intensive metabolism. With the use of vaginal coils, we actually add progesterone, as a result of which these delays are normalized and fertility is increased, thus achieving the desired balance between high productivity and successful reproduction, which is the basis of efficiency on the farm.I advise farmers to work very closely with their veterinarians if they decide to use this timing scheme. It is extremely effective and short, lasting only up to 10 days, ie. guarantees fast results.

Apart from being a method for accelerated fertilization, vaginal coils are also used as a remedy for non-cyclic cows, those with inactive ovaries or the so-called barren cows. This is a chance for them to stay in the herd and breed, not to hastily unsubscribe.

Another disease in which IUDs are particularly effective is ovarian cysts.

I will repeat that in case of problems, and there are such problems in each farm, together with the veterinarian, the animals should be examined to see if they are suitable for the application of a scheme with vaginal coils. They are a kind of lifeline for animals and are especially cost-effective where unnecessary costs are impossible. I suggest everyone to try and see the result of its application.

– Is the method individual or can it be applied in general to the herds?

– Yes, it is also suitable for routine use, as it is short and does not depend on the phase of the sexual cycle. All other schemes have a longer duration and are applicable at a certain stage of cycling.

– Skeptics will be found immediately, who will announce the method of artificial intervention. Are there any side effects that farmers should be warned about?

– I can reassure farmers that in no way can the interference of progesterone in the body of a dairy animal lead to unwanted side effects. This is a natural hormone that is formed in the so-called yellow body. The application of the method can be considered not as a substitute, but as a stimulation of the natural processes in the body. The goal is to maintain high productivity in the herd, while achieving effective and timely reproduction.

I recommend testing 5-6 animals from the herd, gaining your own experience and assessing whether the method is suitable for the farm.

– Is there anything we need to know before applying the method?

– It must have been 60 days since the last calving of the cows, the animals must be well fed and in good general condition. No chronic and severe diseases that are subject to other therapies and treatments. After examining and establishing the good condition of the animal, Prid spirals can help to keep the cow and remain a successful material asset for the farm.

I am open to interest in demonstrating all that has been said in some useful type of practical exercise that will allow farmers to gain a clearer idea of ​​the vaginal IUD scheme. With a video zone and an external screen we can illustrate the processes extremely well.

– And would you perform this preliminary inspection for those farms that do not have a veterinarian to take care of the farm on a daily basis?

– Of course! I am available for any questions or need to visit.

– Thank you Dr. Kolev! We leave the conversation with a sequel, because today we managed to get acquainted with only one of the applied methods. We hope you will take the time to introduce our members to other synchronization schemes to help them make the right and informed decisions.

– I will be happy to assist with useful information and practical advice!

For more information you can contact Dr. Krassimir Kolev by phone: 0884 541 787