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Article ; Online: Association between days post conception and lactation persistency in dairy cattle.

Chen, Y / Steeneveld, W / Frankena, K / Leemans, I / Aardema, H / Vos, P L A M / Nielen, M / Hostens, M

2024

Abstract: Determining the optimal insemination moment for individual cows is complex, particularly when considering the impact of pregnancy on milk production. The effect of pregnancy on the absolute milk yield has already been reported in several studies. ... ...

Abstract	Determining the optimal insemination moment for individual cows is complex, particularly when considering the impact of pregnancy on milk production. The effect of pregnancy on the absolute milk yield has already been reported in several studies. Currently, there is limited quantitative knowledge about the association between days post conception (DPC) and lactation persistency, based on a lactation curve model, and, specifically, how persistency changes during pregnancy and relates to the days in milk at conception (DIMc). Understanding this association might provide valuable insights to determine the optimal insemination moment. This study, therefore, aimed to investigate the association between DPC and lactation persistency, with an additional focus on the influence of DIMc. Available milk production data from 2005 to 2022 were available for 23,908 cows from 87 herds located throughout the Netherlands and Belgium. Persistency was measured by a lactation curve characteristic decay, representing the time taken to halve milk production after peak yield. Decay was calculated for 8 DPC (0, 30, 60, 90, 120, 150, 180 and 210 d after DIMc) and served as the dependent variable. Independent variables included DPC, DIMc (< = 60, 61-90, 91-120, 121-150, 151-180, 181-210, > 210), parity group, DPC × parity group, DPC × DIMc and variables from 30 d before DIMc as covariates. The results showed an increase in decay, i.e., a decrease in persistency, during pregnancy for both parity groups, albeit in different ways. Specifically, from DPC 150 to DPC 210, multiparous cows showed a higher decline in persistency compared with primiparous cows. Furthermore, a later DIMc (cows conceiving later) was associated with higher persistency. Except for the early DIMc groups (DIMc < 90), DIMc does not impact the change in persistency by gestation. The findings from this study contribute to a better understanding of how DPC and DIMc during lactation influence lactation persistency, enabling more informed decision-making by farmers who wish to take persistency into account in their reproduction management.
Language	English
Publishing date	2024-04-03
Publishing country	United States
Document type	Journal Article
ZDB-ID	242499-x
ISSN	1525-3198 ; 0022-0302
ISSN (online)	1525-3198
ISSN	0022-0302
DOI	10.3168/jds.2023-24282
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Article ; Online: Cumulus cells protect the oocyte against saturated free fatty acids.

Aardema, Hilde / Vos, Peter L A M / Gadella, Bart M

Animal reproduction

2018 Volume 15, Issue Suppl 1, Page(s) 737–750

Abstract: In the cow a major characteristic of metabolic stress is an elevated level of plasma free fatty acid, due to increased lipid mobilization from adipose tissue. Elevated levels of free fatty acids in blood (complexed to albumin) are associated with ... ...

Abstract	In the cow a major characteristic of metabolic stress is an elevated level of plasma free fatty acid, due to increased lipid mobilization from adipose tissue. Elevated levels of free fatty acids in blood (complexed to albumin) are associated with increased lipotoxicity in non-adipose tissue. An overview is provided on the negative impact of free fatty acids and the metabolic stress imposed on the oocyte and early embryo and thus on bovine fertility. There is increasing evidence that
Language	English
Publishing date	2018-08-03
Publishing country	Brazil
Document type	Journal Article
ZDB-ID	2227229-X
ISSN	1984-3143 ; 1984-3143
ISSN (online)	1984-3143
ISSN	1984-3143
DOI	10.21451/1984-3143-AR2018-0063
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Article: Fatty Acid Supplementation During

Aardema, H / Bertijn, I / van Tol, Hta / Rijneveld, A / Vernooij, Jcm / Gadella, B M / Vos, Plam

Frontiers in cell and developmental biology

2022 Volume 10, Page(s) 837405

Abstract: ... In ... ...

Abstract	In vitro
Language	English
Publishing date	2022-03-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2737824-X
ISSN	2296-634X
ISSN	2296-634X
DOI	10.3389/fcell.2022.837405
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Article ; Online: An overview on how cumulus cells interact with the oocyte in a condition with elevated NEFA levels in dairy cows.

Aardema, Hilde / van Tol, Helena T A / Vos, Peter L A M

Animal reproduction science

2019 Volume 207, Page(s) 131–137

Abstract: Metabolic stress in humans and animals is associated with impaired fertility. A major characteristic of metabolic stress is elevated levels of free fatty acids (NEFAs) in blood due to mobilization of body fat reserves. Dairy cows undergo a period of ... ...

Abstract	Metabolic stress in humans and animals is associated with impaired fertility. A major characteristic of metabolic stress is elevated levels of free fatty acids (NEFAs) in blood due to mobilization of body fat reserves. Dairy cows undergo a period of metabolic stress during the peri-calving period, the so-called negative energy balance (NEB) in the early weeks postpartum. At the time of NEB, both saturated and unsaturated NEFAs are mobilized to serve as an alternative energy supply for cells, however in particular saturated NEFAs can have a detrimental effect on somatic cells. Circulating NEFAs are also reflected in the follicular fluid of ovarian follicles and hence reach the cumulus-oocyte-complex (COC), which implies a potential risk for the developing oocyte. To this end, the current review focusses on the impact of NEFAs on the quality of the oocyte.
MeSH term(s)	Animal Feed ; Animal Nutritional Physiological Phenomena ; Animals ; Cattle ; Cell Communication/physiology ; Cumulus Cells/physiology ; Dairying ; Fatty Acids, Nonesterified/blood ; Female ; Follicular Fluid/metabolism ; Lactation/metabolism ; Oocytes/physiology
Chemical Substances	Fatty Acids, Nonesterified
Language	English
Publishing date	2019-06-04
Publishing country	Netherlands
Document type	Journal Article ; Review
ZDB-ID	429674-6
ISSN	1873-2232 ; 0378-4320
ISSN (online)	1873-2232
ISSN	0378-4320
DOI	10.1016/j.anireprosci.2019.06.003
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Article ; Online: In vitro maturation of class I oocytes of bovine during different tropical seasons.

Kanwichai, S / Panasophonkul, S / Vos, P L A M / Suriyasathaporn, W

Tropical animal health and production

2019 Volume 51, Issue 5, Page(s) 1279–1282

Abstract: The aims of this study were to determine the effects of seasonality on yields and quality of bovine abattoir-derived oocytes and their in vitro maturation (IVM) competence in Thailand, a tropical country. Ovaries were collected monthly from a ... ...

Abstract	The aims of this study were to determine the effects of seasonality on yields and quality of bovine abattoir-derived oocytes and their in vitro maturation (IVM) competence in Thailand, a tropical country. Ovaries were collected monthly from a slaughterhouse, from January to June 2017, separated into cool (January to February), summer (March to April), and rainy (May to June) seasons. Cumulus oocyte complexes (COCs) were obtained by follicular aspiration, and subsequently, oocyte yield and quality were examined. Selected class I and II COCs were cultured under IVM condition, and their maturation capacity was also evaluated. Results showed that average numbers of COCs and class I COCs per ovary were highest in summer. However, no significant seasonal difference in oocyte maturation rates was found. The higher numbers of COCs and class I COCs in summer might be caused by their follicular development during the cool season, and might be a reason why the pregnancy rate in summer is better than in the rainy season.
MeSH term(s)	Animals ; Cattle ; Female ; In Vitro Oocyte Maturation Techniques/veterinary ; Oocytes/physiology ; Pregnancy ; Seasons ; Thailand ; Tropical Climate
Language	English
Publishing date	2019-01-25
Publishing country	United States
Document type	Journal Article
ZDB-ID	603363-5
ISSN	1573-7438 ; 0049-4747
ISSN (online)	1573-7438
ISSN	0049-4747
DOI	10.1007/s11250-019-01800-w
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Article: Effects of Intrauterine Infusion of a Chitosan Solution on Recovery and Subsequent Reproductive Performance of Early Postpartum Dairy Cows with Endometritis: A Pilot Field Trial.

Okawa, Hiroaki / Wijayagunawardane, Missaka M P / Vos, Peter L A M / Yamato, Osamu / Taniguchi, Masayasu / Takagi, Mitsuhiro

Animals : an open access journal from MDPI

2021 Volume 11, Issue 1

Abstract: This study investigated the efficacy of intrauterine infusion of a chitosan solution (CHT) on uterine recovery in early postpartum dairy cows with or without endometritis, and their subsequent reproductive performance. In Experiment 1, cows with ... ...

Abstract	This study investigated the efficacy of intrauterine infusion of a chitosan solution (CHT) on uterine recovery in early postpartum dairy cows with or without endometritis, and their subsequent reproductive performance. In Experiment 1, cows with endometritis at 3 weeks postpartum were administered CHT (n = 5) and prostaglandin F
Language	English
Publishing date	2021-01-15
Publishing country	Switzerland
Document type	Journal Article
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani11010197
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Article ; Online: Reproductive hormone use and its association with herd-level factors on Dutch dairy farms.

van der Laan, J S M / Vos, P L A M / van den Borne, B H P / Aardema, H / van Werven, T

Journal of dairy science

2021 Volume 104, Issue 10, Page(s) 10854–10862

Abstract: We studied the use of the 3 commonly used reproductive hormones, namely prostaglandins, GnRH, and progesterone, and associated herd-level factors on 760 Dutch dairy farms from 5 veterinary clinics. From 2017 to 2019 we collected data on the sales of ... ...

Abstract	We studied the use of the 3 commonly used reproductive hormones, namely prostaglandins, GnRH, and progesterone, and associated herd-level factors on 760 Dutch dairy farms from 5 veterinary clinics. From 2017 to 2019 we collected data on the sales of reproductive hormones, converted this data into the number of reproductive hormone doses conducted, and expressed this as the annual number of reproductive hormone doses per 100 adult dairy cows. Additional herd-level information was available for 2019. Due to the excess of zeros in the data set (i.e., a substantial number of farms did not use any hormones), we used a zero-inflated negative binomial model to identify related herd-level factors for the use of reproductive hormones. In the entire study period of 2017 to 2019, 5.8% of the dairy farms did not use any reproductive hormones, with the proportion of nonusers varying between 0.0 and 10.3% per veterinary clinic. This proportion was around 13.5% on an annual basis. Prostaglandins were the most frequently used reproductive hormone in Dutch dairy cows (62.9%), followed by GnRH (33.1%) and progesterone (4.0%). Furthermore, participating in a veterinary herd health management program had a significant effect on reproductive hormone use. These farms used more reproductive hormones than farms that did not participate in a herd health management program and were less represented in the group of nonuser farms. Technologies, such as pedometers and automatic milking systems, also had an effect on reproductive hormone use. The presence of pedometers or activity monitors did not reduce the use of the reproductive hormones but was associated with a greater frequency of users. Farms with an automatic milking system used more reproductive hormones than farms with a conventional milking system. With this study, we have made a first step in achieving transparency in the Dutch dairy industry by providing an objective overview of reproductive hormone use on Dutch dairy farms and identifying associations with some herd-level factors.
MeSH term(s)	Animals ; Cattle ; Dairying ; Farms ; Female ; Hormones ; Milk ; Reproduction
Chemical Substances	Hormones
Language	English
Publishing date	2021-07-23
Publishing country	United States
Document type	Journal Article
ZDB-ID	242499-x
ISSN	1525-3198 ; 0022-0302
ISSN (online)	1525-3198
ISSN	0022-0302
DOI	10.3168/jds.2020-19786
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Article: Reproductive hormone use and its association with herd-level factors on Dutch dairy farms

van der Laan, J.S.M. / Vos, P.L.A.M. / van den Borne, B.H.P. / Aardema, H. / van Werven, T.

American Dairy Science Association Journal of dairy science. 2021 Oct., v. 104, no. 10

2021

Abstract	We studied the use of the 3 commonly used reproductive hormones, namely prostaglandins, GnRH, and progesterone, and associated herd-level factors on 760 Dutch dairy farms from 5 veterinary clinics. From 2017 to 2019 we collected data on the sales of reproductive hormones, converted this data into the number of reproductive hormone doses conducted, and expressed this as the annual number of reproductive hormone doses per 100 adult dairy cows. Additional herd-level information was available for 2019. Due to the excess of zeros in the data set (i.e., a substantial number of farms did not use any hormones), we used a zero-inflated negative binomial model to identify related herd-level factors for the use of reproductive hormones. In the entire study period of 2017 to 2019, 5.8% of the dairy farms did not use any reproductive hormones, with the proportion of nonusers varying between 0.0 and 10.3% per veterinary clinic. This proportion was around 13.5% on an annual basis. Prostaglandins were the most frequently used reproductive hormone in Dutch dairy cows (62.9%), followed by GnRH (33.1%) and progesterone (4.0%). Furthermore, participating in a veterinary herd health management program had a significant effect on reproductive hormone use. These farms used more reproductive hormones than farms that did not participate in a herd health management program and were less represented in the group of nonuser farms. Technologies, such as pedometers and automatic milking systems, also had an effect on reproductive hormone use. The presence of pedometers or activity monitors did not reduce the use of the reproductive hormones but was associated with a greater frequency of users. Farms with an automatic milking system used more reproductive hormones than farms with a conventional milking system. With this study, we have made a first step in achieving transparency in the Dutch dairy industry by providing an objective overview of reproductive hormone use on Dutch dairy farms and identifying associations with some herd-level factors.
Keywords	adults ; binomial distribution ; dairy industry ; data collection ; herd health ; progesterone ; prostaglandins ; veterinary clinics
Language	English
Dates of publication	2021-10
Size	p. 10854-10862.
Publishing place	Elsevier Inc.
Document type	Article
ZDB-ID	242499-x
ISSN	1525-3198 ; 0022-0302
ISSN (online)	1525-3198
ISSN	0022-0302
DOI	10.3168/jds.2020-19786
Database	NAL-Catalogue (AGRICOLA)

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Article: Association between Anti-Müllerian Hormone Concentration and Inflammation Markers in Serum during the Peripartum Period in Dairy Cows.

Okawa, Hiroaki / Monniaux, Danielle / Mizokami, Chihiro / Fujikura, Atsushi / Takano, Toshihiro / Sato, Satoko / Shinya, Urara / Kawashima, Chiho / Yamato, Osamu / Fushimi, Yasuo / Vos, Peter L A M / Taniguchi, Masayasu / Takagi, Mitsuhiro

Animals : an open access journal from MDPI

2021 Volume 11, Issue 5

Abstract: The relationships between changes in anti-Müllerian hormone (AMH) concentration and various traits, including milk somatic cell counts (SCC), were evaluated. Blood samples were collected from 43 Holstein cows 14 days before (D-14) and 10 (D10) and 28 ... ...

Abstract	The relationships between changes in anti-Müllerian hormone (AMH) concentration and various traits, including milk somatic cell counts (SCC), were evaluated. Blood samples were collected from 43 Holstein cows 14 days before (D-14) and 10 (D10) and 28 days after (D28) parturition, and vaginal discharge score (VDS) and polymorphonuclear leukocyte (PMNL) percentages were assessed in endometrial samples at D28. Cows were separated into four quartiles (Q1-Q4) based on changes in AMH concentration during the peripartum period (AMH ratio: D28/D-14). Correlations between AMH ratio and each parameter were evaluated and classified into high-AMH (Q4, 1.83 ± 0.12,
Language	English
Publishing date	2021-04-26
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2606558-7
ISSN	2076-2615
ISSN	2076-2615
DOI	10.3390/ani11051241
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Article ; Online: Reproductive hormone use and its association with herd-level factors on Dutch dairy farms

van der Laan, J.S.M. / Vos, P.L.A.M. / van den Borne, B.H.P. / Aardema, H. / van Werven, T.

Journal of Dairy Science

2021 Volume 104, Issue 10

Abstract	We studied the use of the 3 commonly used reproductive hormones, namely prostaglandins, GnRH, and progesterone, and associated herd-level factors on 760 Dutch dairy farms from 5 veterinary clinics. From 2017 to 2019 we collected data on the sales of reproductive hormones, converted this data into the number of reproductive hormone doses conducted, and expressed this as the annual number of reproductive hormone doses per 100 adult dairy cows. Additional herd-level information was available for 2019. Due to the excess of zeros in the data set (i.e., a substantial number of farms did not use any hormones), we used a zero-inflated negative binomial model to identify related herd-level factors for the use of reproductive hormones. In the entire study period of 2017 to 2019, 5.8% of the dairy farms did not use any reproductive hormones, with the proportion of nonusers varying between 0.0 and 10.3% per veterinary clinic. This proportion was around 13.5% on an annual basis. Prostaglandins were the most frequently used reproductive hormone in Dutch dairy cows (62.9%), followed by GnRH (33.1%) and progesterone (4.0%). Furthermore, participating in a veterinary herd health management program had a significant effect on reproductive hormone use. These farms used more reproductive hormones than farms that did not participate in a herd health management program and were less represented in the group of nonuser farms. Technologies, such as pedometers and automatic milking systems, also had an effect on reproductive hormone use. The presence of pedometers or activity monitors did not reduce the use of the reproductive hormones but was associated with a greater frequency of users. Farms with an automatic milking system used more reproductive hormones than farms with a conventional milking system. With this study, we have made a first step in achieving transparency in the Dutch dairy industry by providing an objective overview of reproductive hormone use on Dutch dairy farms and identifying associations with some herd-level ...
Keywords	dairy cow ; hormone treatment ; management ; reproduction
Subject code	630
Language	English
Publishing country	nl
Document type	Article ; Online
ZDB-ID	242499-x
ISSN	1525-3198 ; 0022-0302
ISSN (online)	1525-3198
ISSN	0022-0302
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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