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Article

Dynamic Changes in Progesterone Concentration in Cows’ Milk Determined by the At-Line Milk Analysis System Herd NavigatorTM

1
Large Animal Clinic, Veterinary Academy, Lithuanian University of Health Sciences, LT-47181 Kaunas, Lithuania
2
Department of Animal Breeding, Veterinary Academy, Lithuanian University of Health Sciences, LT-47181 Kaunas, Lithuania
3
University Clinic for Ruminants, University of Veterinary Medicine, A-1210 Vienna, Austria
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(18), 5020; https://doi.org/10.3390/s20185020
Received: 28 July 2020 / Revised: 15 August 2020 / Accepted: 18 August 2020 / Published: 4 September 2020
(This article belongs to the Special Issue Sensors for Animal Health Monitoring and Precision Livestock Farming)
According to the literature, the at-line progesterone monitoring system Herd NavigatorTM (Lattec I/S, Hillerød, Denmark) was used in combination with a DeLaval milking robot (DeLaval Inc., Tumba, Sweden). It works automatically and provides real-time physiological information about lactating dairy cows. For making farm-management decisions, it is not only a novel tool for scientific research, but also a mechanism for improving productivity, food safety, animal well-being, the environment, and the public perception of the dairy industry. It has been hypothesized that the progesterone concentration determined by the at-line milk analysis system and changes in its dynamics correlate with the parity, reproductive status, and milk yield of cows. The aim of the current study was to evaluate relative at-line milk progesterone (mP4) dynamic changes, according to the parity and status of reproduction, and to estimate the relationship with productivity in dairy cows. Frequent automated mP4 sampling can help identify characteristics of mP4 dynamic changes associated with successful pregnancies, pregnancy losses, and potential differences in mP4 dynamics among parity groups, which have not been studied previously.
The aim of the current instant study was to evaluate relative at-line milk progesterone dynamic changes according to parity and status of reproduction and to estimate the relationship with productivity in dairy cows by at-line milk analysis system Herd NavigatorTM. According to the progesterone assay, experimental animals were divided into three periods: postpartum, after insemination, and pregnancy. In the first stage of the postpartum period, progesterone levels in milk were monitored every 5 days. This period of reproductive cycle recovery was followed for 30 days (days 0–29). The second stage of the postpartum period (30–65 days) lasted until cows were inseminated. In the period (0–45 days) after cow insemination, progesterone levels were distributed according to whether or not cows became pregnant. For milk progesterone detection, the fully automated real-time progesterone analyzer Herd NavigatorTM (Lattec I/S, Hillerød, Denmark) was used in combination with a DeLaval milking robot (DeLaval Inc., Tumba, Sweden). We found that an at-line progesterone concentration is related to different parities, reproductive statuses, and milk yield of cows: the 12.88% higher concentration of progesterone in milk was evaluated in primiparous cows. The average milk yield in non-pregnant primiparous cows was 4.64% higher, and in non-pregnant multiparous cows 6.87% higher than in pregnant cows. Pregnancy success in cows can be predicted 11–15 days after insemination, when a significant increase in progesterone is observed in the group of pregnant cows. View Full-Text
Keywords: precision dairy farming; milk progesterone; production; reproduction; automatic milking system precision dairy farming; milk progesterone; production; reproduction; automatic milking system
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MDPI and ACS Style

Antanaitis, R.; Malašauskienė, D.; Televičius, M.; Juozaitienė, V.; Žilinskas, H.; Baumgartner, W. Dynamic Changes in Progesterone Concentration in Cows’ Milk Determined by the At-Line Milk Analysis System Herd NavigatorTM. Sensors 2020, 20, 5020. https://doi.org/10.3390/s20185020

AMA Style

Antanaitis R, Malašauskienė D, Televičius M, Juozaitienė V, Žilinskas H, Baumgartner W. Dynamic Changes in Progesterone Concentration in Cows’ Milk Determined by the At-Line Milk Analysis System Herd NavigatorTM. Sensors. 2020; 20(18):5020. https://doi.org/10.3390/s20185020

Chicago/Turabian Style

Antanaitis, Ramūnas, Dovilė Malašauskienė, Mindaugas Televičius, Vida Juozaitienė, Henrikas Žilinskas, and Walter Baumgartner. 2020. "Dynamic Changes in Progesterone Concentration in Cows’ Milk Determined by the At-Line Milk Analysis System Herd NavigatorTM" Sensors 20, no. 18: 5020. https://doi.org/10.3390/s20185020

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