Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation

J. Ma, R.J. van Hoeij, T.J.G.M. Lam, B. Kemp, A.T.M. van Knegsel

Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

Abstract

Negative energy balance (NEB) in dairy cows results from a fast increase in milk production post calving while feed intake is limited in this period. NEB is accompanied with an altered metabolic status, which triggers metabolic disorders. Metabolic status in early lactation is related with reproductive performance, e.g. reduced concentrations of insulin and IGF-I, which contributes to reduced follicular responsiveness to gonadotrophic stimulation, and thus prevents the dominant follicle to ovulate, resulting in a delay in the resumption of cyclicity. Omitting or shortening the dry period (DP), adjusting dietary energy level or feeding different dietary energy sources is of interest because that could minimize the risk of NEB, postpartum metabolic diseases and suboptimal fertility like delayed resumption of postpartum ovarian cyclicity. The aim of this study is to investigate the effect of DP length, dietary energy level, dietary energy source and interactions among these factors on fertility (resumption of ovarian cyclicity and days open) of dairy cows postpartum. Additionally, the relation between energy balance and metabolic status of dairy cows during early lactation and resumption of ovarian cyclicity and days open will be evaluated.
Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Production Diseases in Farm Animals
EditorsRupert M. Bruckmaier, Josef J. Gross
Place of PublicationBern, Switserland
PublisherUniversity of Bern
Pages176-176
ISBN (Print)9783906813936
Publication statusPublished - 2019
Event17th International Conference on Production Diseases in Farm Animals (ICPD) - Bern, Switzerland
Duration: 27 Jun 201929 Jun 2019

Conference

Conference17th International Conference on Production Diseases in Farm Animals (ICPD)
CountrySwitzerland
CityBern
Period27/06/1929/06/19

Cite this

Ma, J., van Hoeij, R. J., Lam, T. J. G. M., Kemp, B., & van Knegsel, A. T. M. (2019). Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation. In R. M. Bruckmaier, & J. J. Gross (Eds.), Proceedings of the 17th International Conference on Production Diseases in Farm Animals (pp. 176-176). Bern, Switserland: University of Bern.
Ma, J. ; van Hoeij, R.J. ; Lam, T.J.G.M. ; Kemp, B. ; van Knegsel, A.T.M. / Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation. Proceedings of the 17th International Conference on Production Diseases in Farm Animals . editor / Rupert M. Bruckmaier ; Josef J. Gross. Bern, Switserland : University of Bern, 2019. pp. 176-176
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abstract = "Negative energy balance (NEB) in dairy cows results from a fast increase in milk production post calving while feed intake is limited in this period. NEB is accompanied with an altered metabolic status, which triggers metabolic disorders. Metabolic status in early lactation is related with reproductive performance, e.g. reduced concentrations of insulin and IGF-I, which contributes to reduced follicular responsiveness to gonadotrophic stimulation, and thus prevents the dominant follicle to ovulate, resulting in a delay in the resumption of cyclicity. Omitting or shortening the dry period (DP), adjusting dietary energy level or feeding different dietary energy sources is of interest because that could minimize the risk of NEB, postpartum metabolic diseases and suboptimal fertility like delayed resumption of postpartum ovarian cyclicity. The aim of this study is to investigate the effect of DP length, dietary energy level, dietary energy source and interactions among these factors on fertility (resumption of ovarian cyclicity and days open) of dairy cows postpartum. Additionally, the relation between energy balance and metabolic status of dairy cows during early lactation and resumption of ovarian cyclicity and days open will be evaluated.",
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year = "2019",
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Ma, J, van Hoeij, RJ, Lam, TJGM, Kemp, B & van Knegsel, ATM 2019, Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation. in RM Bruckmaier & JJ Gross (eds), Proceedings of the 17th International Conference on Production Diseases in Farm Animals . University of Bern, Bern, Switserland, pp. 176-176, Bern, Switzerland, 27/06/19.

Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation. / Ma, J.; van Hoeij, R.J.; Lam, T.J.G.M.; Kemp, B.; van Knegsel, A.T.M.

Proceedings of the 17th International Conference on Production Diseases in Farm Animals . ed. / Rupert M. Bruckmaier; Josef J. Gross. Bern, Switserland : University of Bern, 2019. p. 176-176.

Research output: Chapter in Book/Report/Conference proceedingAbstractAcademic

TY - CHAP

T1 - Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation

AU - Ma, J.

AU - van Hoeij, R.J.

AU - Lam, T.J.G.M.

AU - Kemp, B.

AU - van Knegsel, A.T.M.

PY - 2019

Y1 - 2019

N2 - Negative energy balance (NEB) in dairy cows results from a fast increase in milk production post calving while feed intake is limited in this period. NEB is accompanied with an altered metabolic status, which triggers metabolic disorders. Metabolic status in early lactation is related with reproductive performance, e.g. reduced concentrations of insulin and IGF-I, which contributes to reduced follicular responsiveness to gonadotrophic stimulation, and thus prevents the dominant follicle to ovulate, resulting in a delay in the resumption of cyclicity. Omitting or shortening the dry period (DP), adjusting dietary energy level or feeding different dietary energy sources is of interest because that could minimize the risk of NEB, postpartum metabolic diseases and suboptimal fertility like delayed resumption of postpartum ovarian cyclicity. The aim of this study is to investigate the effect of DP length, dietary energy level, dietary energy source and interactions among these factors on fertility (resumption of ovarian cyclicity and days open) of dairy cows postpartum. Additionally, the relation between energy balance and metabolic status of dairy cows during early lactation and resumption of ovarian cyclicity and days open will be evaluated.

AB - Negative energy balance (NEB) in dairy cows results from a fast increase in milk production post calving while feed intake is limited in this period. NEB is accompanied with an altered metabolic status, which triggers metabolic disorders. Metabolic status in early lactation is related with reproductive performance, e.g. reduced concentrations of insulin and IGF-I, which contributes to reduced follicular responsiveness to gonadotrophic stimulation, and thus prevents the dominant follicle to ovulate, resulting in a delay in the resumption of cyclicity. Omitting or shortening the dry period (DP), adjusting dietary energy level or feeding different dietary energy sources is of interest because that could minimize the risk of NEB, postpartum metabolic diseases and suboptimal fertility like delayed resumption of postpartum ovarian cyclicity. The aim of this study is to investigate the effect of DP length, dietary energy level, dietary energy source and interactions among these factors on fertility (resumption of ovarian cyclicity and days open) of dairy cows postpartum. Additionally, the relation between energy balance and metabolic status of dairy cows during early lactation and resumption of ovarian cyclicity and days open will be evaluated.

M3 - Abstract

SN - 9783906813936

SP - 176

EP - 176

BT - Proceedings of the 17th International Conference on Production Diseases in Farm Animals

A2 - Bruckmaier, Rupert M.

A2 - Gross, Josef J.

PB - University of Bern

CY - Bern, Switserland

ER -

Ma J, van Hoeij RJ, Lam TJGM, Kemp B, van Knegsel ATM. Relationship between resumption of ovarian activity, days open, energy balance and metabolic status in dairy cows with different dry period lengths in early lactation. In Bruckmaier RM, Gross JJ, editors, Proceedings of the 17th International Conference on Production Diseases in Farm Animals . Bern, Switserland: University of Bern. 2019. p. 176-176