A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland
The purpose of this survey was to evaluate the reproductive performance of dairy cows on problem farms in southern Iceland. In all 229 cows on 6 farms were studied. The animals were examined clinically by rectal palpation, once a month. Blood samples were taken 2–5 and 7–10 weeks after calving. The...
Published in: | Acta Veterinaria Scandinavica |
---|---|
Main Authors: | , , |
Format: | Text |
Language: | English |
Published: |
BioMed Central
1985
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8202702/ http://www.ncbi.nlm.nih.gov/pubmed/3836564 https://doi.org/10.1186/BF03546515 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:8202702 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:8202702 2023-05-15T16:49:05+02:00 A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland Eldon, J. Olafsson, Th. Thorsteinsson, Th. 1985-12-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8202702/ http://www.ncbi.nlm.nih.gov/pubmed/3836564 https://doi.org/10.1186/BF03546515 en eng BioMed Central http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8202702/ http://www.ncbi.nlm.nih.gov/pubmed/3836564 http://dx.doi.org/10.1186/BF03546515 © The Author(s) 1985 Acta Vet Scand Article Text 1985 ftpubmed https://doi.org/10.1186/BF03546515 2021-06-20T00:54:11Z The purpose of this survey was to evaluate the reproductive performance of dairy cows on problem farms in southern Iceland. In all 229 cows on 6 farms were studied. The animals were examined clinically by rectal palpation, once a month. Blood samples were taken 2–5 and 7–10 weeks after calving. The blood samples were analysed for the contents of glucose, urea, inorganic phosphate, calcium and magnesium. Milk samples for progesterone profiles were taken, by the farmer, every 4th day from day 10 postpartum until first oestrus. Because of this sampling method, 128 cows had no rise in progesterone levels, when milk sampling was stopped. These 128 animals were excluded from the study. The results are based on 101 animals. There was a large variation between cows in postpartum reproductive performance. In the total material 1st ovulation occurred later than reported in many other countries. Fifty percent of the cows had ovulated 35 days after calving and 90 percent 70 days after calving. The first luteal phase was short in about 60 % of the cows. The progesterone values assayed from those short cycles were lower than the values assayed from the following cycle. First artificial insemination (ai) was on the average 77 days postpartum (pp). The conception rate to first service was 49 %. Of 100 milk samples taken at the time of ai, 20 had high progesterone value. This indicates a high frequency of luteal phase inseminations. Clinical ketosis was diagnosed in 35 cows. Of these, 31 had a low glucose value. Cows with clinical ketosis ovulated, on the average, later than other animals and 24 ovulated later than 40 days pp. The results indicated that the fertility problems of these cows studied were late ovulations, low conception rate, probably in part, due to luteal phase inseminations, and a high frequency of ketosis which could be caused by low quality feedstuff. Text Iceland PubMed Central (PMC) Acta Veterinaria Scandinavica 26 4 431 441 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Article |
spellingShingle |
Article Eldon, J. Olafsson, Th. Thorsteinsson, Th. A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
topic_facet |
Article |
description |
The purpose of this survey was to evaluate the reproductive performance of dairy cows on problem farms in southern Iceland. In all 229 cows on 6 farms were studied. The animals were examined clinically by rectal palpation, once a month. Blood samples were taken 2–5 and 7–10 weeks after calving. The blood samples were analysed for the contents of glucose, urea, inorganic phosphate, calcium and magnesium. Milk samples for progesterone profiles were taken, by the farmer, every 4th day from day 10 postpartum until first oestrus. Because of this sampling method, 128 cows had no rise in progesterone levels, when milk sampling was stopped. These 128 animals were excluded from the study. The results are based on 101 animals. There was a large variation between cows in postpartum reproductive performance. In the total material 1st ovulation occurred later than reported in many other countries. Fifty percent of the cows had ovulated 35 days after calving and 90 percent 70 days after calving. The first luteal phase was short in about 60 % of the cows. The progesterone values assayed from those short cycles were lower than the values assayed from the following cycle. First artificial insemination (ai) was on the average 77 days postpartum (pp). The conception rate to first service was 49 %. Of 100 milk samples taken at the time of ai, 20 had high progesterone value. This indicates a high frequency of luteal phase inseminations. Clinical ketosis was diagnosed in 35 cows. Of these, 31 had a low glucose value. Cows with clinical ketosis ovulated, on the average, later than other animals and 24 ovulated later than 40 days pp. The results indicated that the fertility problems of these cows studied were late ovulations, low conception rate, probably in part, due to luteal phase inseminations, and a high frequency of ketosis which could be caused by low quality feedstuff. |
format |
Text |
author |
Eldon, J. Olafsson, Th. Thorsteinsson, Th. |
author_facet |
Eldon, J. Olafsson, Th. Thorsteinsson, Th. |
author_sort |
Eldon, J. |
title |
A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
title_short |
A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
title_full |
A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
title_fullStr |
A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
title_full_unstemmed |
A Survey of the Postpartum Reproductive Performance of Dairy Cows with Fertility Problems in Southern Iceland |
title_sort |
survey of the postpartum reproductive performance of dairy cows with fertility problems in southern iceland |
publisher |
BioMed Central |
publishDate |
1985 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8202702/ http://www.ncbi.nlm.nih.gov/pubmed/3836564 https://doi.org/10.1186/BF03546515 |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Acta Vet Scand |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8202702/ http://www.ncbi.nlm.nih.gov/pubmed/3836564 http://dx.doi.org/10.1186/BF03546515 |
op_rights |
© The Author(s) 1985 |
op_doi |
https://doi.org/10.1186/BF03546515 |
container_title |
Acta Veterinaria Scandinavica |
container_volume |
26 |
container_issue |
4 |
container_start_page |
431 |
op_container_end_page |
441 |
_version_ |
1766039154995494912 |