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Factors connected with pregnancy loss in dairy cows

100%

Gehrke M., Zbylut J.

Bulletin of the Veterinary Institute in Puławy

2011

tom 55

nr 3

The aim of the study was to determine the influence of chosen factors: subsequent lactations in which pregnancy was diagnosed, the month in which successful insemination was performed, the length of the calving-conception period, the number of inseminations, and the culling rate on the pregnancy loss index, and to evaluate the relationship between culling and risk of abortion. The analysis involved 1,056 pregnancies diagnosed in 378 cows during nine years of observations. An increase in the number of cows being in the third and following lactations in successive years was connected with an increasing pregnancy loss ratio up to 90 d after insemination (P=0.034) and decreasing pregnancy loss observed later (P=0.045). The pregnancy loss rate during the first trimester was the lowest in primiparous cows (4.73%). Simultaneously, in primiparous cows and in cows in the second lactation, the highest pregnancy loss rate between 91-260 d after insemination was noted (8.19% and 8.68%, respectively). It was demonstrated that pregnancy loss up to 90 d of its development was observed most frequently after inseminations made in April (P=0.027) and most seldom after inseminations made in August. Pregnaney losses in the second and third trimesters were the most frequently observed after inseminations performed in July (P=0.040) and October (P=0.031), and the most seldom when the inseminations were performed in April. Culling of primiparous cows decreased the risk of pregnancy loss after inseminations in the second lactation in the other cows.

Rectal palpation for pregnancy in cows: A relic or an alternative to modern diagnostic methods

100%

Jaskowski J. M., Kaczmarowski M., Kulus J., Jaskowski B. M., Herudzinska M., Gehrke M.

Medycyna Weterynaryjna

2019

tom 75

nr 05

Early diagnosis of pregnancy in cattle is an important factor determining the profitability of breeding. It can shorten the intercalving period by accelerating the next insemination procedure or diagnosing the cause of infertility. Palpation of the reproductive system per rectum is a method used for more than 100 years. It involves palpation of the uterine horns to detect the fetal vesicle, fetus water and the embryo itself. The earliest time when the fetal bladder can be detected is the 28th day after insemination in heifers or the 32nd-35th day in multiparous cows. The method is fast and cheap, it does not require additional equipment, and the result is immediate. An effective examination by this method is not easy and requires theoretical and practical preparation. The method also involves the risk of causing fetal damage, resulting in the loss of pregnancy and deterioration in the cow’s well-being. An upgrade of the method is the introduction of ultrasound rectal examination, which increases the efficiency of diagnosis and shortens the time from insemination to examination. Despite its long history, the diagnosis of early pregnancy by rectal examination has not lost its importance or popularity. Although new methods of diagnosing pregnancy continue to be introduced in today’s practice, they do not diminish the importance of rectal palpitation.

Ograniczanie wyników

1 Bulletin of the Veterinary Institute in Puławy

1 Medycyna Weterynaryjna

2 Gehrke M.

1 Herudzinska M.

1 Jaskowski B. M.

1 Jaskowski J. M.

1 Kaczmarowski M.

1 Kulus J.

1 Zbylut J.

1 2019

1 2011

Wyniki wyszukiwania

Factors connected with pregnancy loss in dairy cows

Rectal palpation for pregnancy in cows: A relic or an alternative to modern diagnostic methods