556 results match your criteria lactational performance


Effect of Thyromimetic GC-1 Selective Signaling on Reproductive and Lactational Performance in the Hypothyroid Rat.

Eur Thyroid J 2021 Jul 27;10(5):425-433. Epub 2021 May 27.

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Cuyo, Mendoza, Argentina.

Introduction: The potential of the thyroid hormone receptor β (TRβ1) selective analog GC-1 has been widely proven in animal models and humans. However, its effect on the reproductive stage of the female rat has not been evaluated.

Methods: The effect of the administration of GC-1 or equimolar doses of triiodothyronine (T3) was evaluated on the reproductive performance of the hypothyroid female rat and the indirect effect on pup thyroid status, weight, and survival. Read More

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Relationship between lactational performance and metabolic parameters of Mongolian native grazing mares.

J Equine Sci 2021 6;32(3):91-98. Epub 2021 Sep 6.

School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia.

Information regarding the lactational performance of mares in relation to metabolic parameters can help practitioners to manipulate animal rearing management for sustainable mare milk production. The aim of this study was to characterize the lactational performance of Mongolian native mares grazing on natural pastureland by revealing the seasonal effects on metabolic parameters. In this study, 8 multiparous mares were used. Read More

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September 2021

Reducing metabolizable protein supply: Effects on milk production, blood metabolites, and health in early-lactation dairy cows.

J Dairy Sci 2021 Sep 2. Epub 2021 Sep 2.

William H. Miner Agricultural Research Institute, Chazy, NY 12921. Electronic address:

Our objective was to evaluate the effect of metabolizable protein (MP) supply on milk production, blood metabolites, and health in dairy cows during early lactation. Three experimental diets were formulated to contain 114, 107, 101 g of MP/kg of dry matter (DM; 114MP, 107MP, and 101MP, respectively) with crude protein contents of 17.0, 16. Read More

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September 2021

Effects of dietary phosphorus concentration during the transition period on plasma calcium concentrations, feed intake, and milk production in dairy cows.

J Dairy Sci 2021 Aug 25. Epub 2021 Aug 25.

Department of Population Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 7, 3584 CL Utrecht, the Netherlands.

Our aim was to evaluate the effects of a low or high dietary phosphorus (P) concentration during the dry period, followed by either a high or low dietary P concentration during the first 8 wk of lactation, on plasma Ca concentrations, feed intake, and lactational performance of dairy cattle. Sixty pregnant multiparous Holstein Friesian dairy cows were assigned to a randomized block design with repeated measurements and dietary treatments arranged in a 2 × 2 factorial fashion. The experimental diets contained 3. Read More

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Dietary supplementation with rumen-protected capsicum during the transition period improves the metabolic status of dairy cows.

J Dairy Sci 2021 Aug 18. Epub 2021 Aug 18.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

In ruminants, it has been observed that capsicum oleoresin can alter insulin responses and that high-intensity artificial sweetener can increase glucose absorption from the small intestine. Because glucose metabolism and insulin responses are critical during early lactation, these supplements might have an effect on the metabolic status of dairy cows during the transition period. The objective of this experiment was to evaluate the effects of rumen-protected capsicum oleoresin fed alone or in combination with artificial sweetener during the transition period on lactational performance and susceptibility to subclinical ketosis in dairy cows. Read More

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The link between knowledge of the maternal diet and breastfeeding practices in mothers and health workers in Poland.

Int Breastfeed J 2021 Aug 9;16(1):58. Epub 2021 Aug 9.

Department and Clinic of Neonatology, Wroclaw Medical University, Wroclaw, Poland.

Background: There are multiple misconceptions concerning the breastfeeding mother's diet and its adverse impact on breast milk composition and the breastfed child's health, which might lead to breastfeeding cessation. Although prophylactic maternal dietary restrictions are not recommended, mothers all over the world are often recommended to avoid certain foods, due to cultural beliefs, social pressure and even outdated or ambiguous medical recommendations. In Poland, there is no systematic approach to breastfeeding education in the form of nationwide educational programs for particular social groups. Read More

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Association between phagocytic activity of monocytes and days to conception after parturition in dairy cows when considering the hormonal and metabolic milieu.

Anim Reprod Sci 2021 Sep 26;232:106818. Epub 2021 Jul 26.

Laboratorio de Biología Celular y Molecular Aplicada, Instituto de Ciencias Veterinarias del Litoral (ICiVet-Litoral), Universidad Nacional del Litoral (UNL)/Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Esperanza, Santa Fe, Argentina; Facultad de Ciencias Veterinarias del Litoral, Universidad Nacional del Litoral (UNL), Esperanza, Santa Fe, Argentina. Electronic address:

The nutritional conditions and immune status of dairy cows affect reproductive performance. This study was conducted with the aim to analyze the phagocytic activity (PA) and phagocytic capacity (PC) of circulating monocytes after the period of transition from pregnancy to lactation, to evaluate possible associations with duration of time period to conception following parturition. Results indicated PA was not associated with duration of time period to conception following parturition. Read More

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September 2021

Compensatory feeding during early gestation for sows with a high weight loss after a summer lactation increased piglet birth weight but reduced litter size.

J Anim Sci 2021 Sep;99(9)

Department of Animal Science, Cornell University, Ithaca, NY 14853, USA.

Sows mated in summer produce a greater proportion of born-light piglets (<1.1 kg) which contributes to increased carcass fatness in the progeny population. The reasons for the low birth weight of these piglets remain unclear, and there have been few successful mitigation strategies identified. Read More

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September 2021

Supplementing additional cobalt as cobalt lactate in a high-forage total mixed ration fed to late-lactation dairy cows.

J Dairy Sci 2021 Oct 30;104(10):10669-10677. Epub 2021 Jul 30.

Ralco Inc., 1600 Hahn Road, Marshall, MN 56258.

Cobalt lactate is a highly soluble ruminal Co source. Prior research evaluating higher Co feeding rates demonstrated increased ruminal fiber digestion. Feeding high-forage (>70%) rations to late-lactation dairy cows to enhance income over feed cost could potentially benefit from higher ruminal-soluble Co inclusion rates to enhance ruminal fiber and nutrient digestibility. Read More

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October 2021

Lactational performance, rumen fermentation, and enteric methane emission of dairy cows fed an amylase-enabled corn silage.

J Dairy Sci 2021 Sep 10;104(9):9827-9841. Epub 2021 Jul 10.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

This study investigated the effects of an amylase-enabled corn silage on lactational performance, enteric CH emission, and rumen fermentation of lactating dairy cows. Following a 2-wk covariate period, 48 Holstein cows were blocked based on parity, days in milk, milk yield (MY), and CH emission. Cows were randomly assigned to 1 of 2 treatments in an 8-wk randomized complete block design experiment: (1) control corn silage (CON) from an isogenic corn without α-amylase trait and (2) Enogen hybrid corn (Syngenta Seeds LLC) harvested as silage (ECS) containing a bacterial transgene expressing α-amylase (i. Read More

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September 2021

Metabolic and endocrine responses to short-term nutrient imbalances in the feed ration of mid-lactation dairy cows.

Animal 2021 Jul 25;15(7):100306. Epub 2021 Jun 25.

Veterinary Physiology, Vetsuisse Faculty, University of Bern, 3012 Bern, Switzerland.

Short-term imbalances of dietary nutrients occur during natural fluctuations in roughage quality (e.g. on pasture) or temporal shortages of supplementary feed components. Read More

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Providing domperidone throughout lactation enhances sow lactation performance.

J Anim Sci 2021 Aug;99(8)

Agriculture and Agri-Food Canada, Sherbrooke R & D Centre, 2000 College, Sherbrooke, Québec J1M 0C8, Canada.

The goal of this project was to determine the effects of domperidone given throughout lactation on hormonal and metabolic status, lactational performance, and gene expression in mammary epithelial cells of sows. Second parity sows were divided in two treatment groups: 1) daily intramuscular injections with canola oil (Control, CTL, n = 24), or 2) daily intramuscular injections with 0.5 mg/kg body weight (BW) of domperidone (DOMP, n = 23). Read More

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Pyrethroids Toxicity to Male Reproductive System and Offspring as a Function of Oxidative Stress Induction: Rodent Studies.

Front Endocrinol (Lausanne) 2021 27;12:656106. Epub 2021 May 27.

The State Key Lab of Reproductive, Department of Urology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.

Pyrethroids may be related to male reproductive system damage. However, the results of many previous studies are contradictory and uncertain. Therefore, a systematic review and a meta-analysis were performed to assess the relationship between pyrethroid exposure and male reproductive system damage. Read More

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Histidine dose-response effects on lactational performance and plasma amino acid concentrations in lactating dairy cows: 2. Metabolizable protein-deficient diet.

J Dairy Sci 2021 Sep 5;104(9):9917-9930. Epub 2021 Jun 5.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

The objective of this experiment was to determine the effect of increasing digestible His (dHis) levels with a rumen-protected (RP) His product on milk production, milk composition, and plasma AA concentrations in lactating dairy cows fed a metabolizable protein (MP)-deficient diet, according to the National Research Council dairy model from 2001. The companion paper presents results on the effect of increasing dHis dose with a MP-adequate basal diet. Twenty Holstein cows, of which 8 were rumen-cannulated, were used in a replicated 4 × 4 Latin square design experiment with four 28-d periods. Read More

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September 2021

Histidine dose-response effects on lactational performance and plasma amino acid concentrations in lactating dairy cows: 1. Metabolizable protein-adequate diet.

J Dairy Sci 2021 Sep 5;104(9):9902-9916. Epub 2021 Jun 5.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

The objective of this experiment was to determine the effect of increasing digestible His (dHis) doses on milk production, milk composition, and plasma AA concentrations in lactating dairy cows fed diets that meet or exceed their energy and metabolizable protein (MP) requirements. In a companion paper (Räisänen et al., 2021) results are presented on the effect of increasing dHis dose with an MP-deficient basal diet. Read More

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September 2021

Effects of dietary supplementation of nucleotides from late gestation to lactation on the performance and oxidative stress status of sows and their offspring.

Anim Nutr 2021 Mar 28;7(1):111-118. Epub 2020 Dec 28.

National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, 410125, China.

Increased metabolic burdens in breeding sows, which are induced by elevated systemic oxidative stress, could increase the need for nucleotides to repair lymphocyte DNA damage; however, de novo synthesis of nucleotides may be insufficient to cover this increased need. This study investigated the effects of dietary nucleotides on milk composition, oxidative stress status, and the reproductive and lactational performance of sows. Forty multiparous sows were assigned to 2 dietary treatments (Control group, and 1 g/kg Nucleotides group) based on a randomized complete block design using their BW at 85 d of gestation as a block. Read More

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Effects of Amaranthus hypochondriacus supplementation during gestation and lactation on the apparent total tract digestibility of nutrients, lactational feed intake, and litter performance in sows.

Vet Med Sci 2021 May 6. Epub 2021 May 6.

Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, College of Life Sciences, Hunan Normal University, Changsha, China.

The purpose of this study was to investigate the effects of Amaranthus hypochondriacus (AH) inclusion in the diets of gestating and lactating sows on the lactational feed intake, nutrient digestibility, and growth performance of suckling piglets. During gestation, 40 multiparous Landrace sows were restrictively fed with either a control diet or a diet including 30% AH. Both diets had similar levels of digestible energy and crude protein, but the 30% AH diet had higher crude fibre levels than the control diet. Read More

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Implementing a Novel Facility-Community Intervention for Strengthening Integration of Infant Nutrition and Family Planning in Mara and Kagera, Tanzania.

Int J Environ Res Public Health 2021 04 13;18(8). Epub 2021 Apr 13.

UNICEF, Dar es Salaam, Tanzania.

Tanzania has high fertility, low contraceptive prevalence and low exclusive breastfeeding (EBF). The Lake Zone, including Mara and Kagera regions, leads the country in total fertility; use of the lactational amenorrhea method (LAM) is negligible. This pre-/post-study explored the effects of a multi-level facility and community intervention (service delivery support, community engagement, media and LAM tracking) to integrate maternal and infant nutrition and postpartum family planning (FP) within existing health contacts. Read More

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Concentrate allowance and corn grain processing influence milk production, body reserves, milk fatty acid profile, and blood metabolites of dairy cows in the early postpartum period.

J Dairy Sci 2021 May 6;104(5):5479-5492. Epub 2021 Mar 6.

Innovation Center, Ferdowsi University of Mashhad, PO Box 9177948974, Mashhad, Iran. Electronic address:

The study goal was to determine the effects of a fast (FAS) or slow (SLW) incremental rate of concentrate feeding and corn processing method during the early postpartum period on lactational performance, body reserves, blood metabolites, and milk fatty acid (FA) profile. Forty multiparous Holstein cows were used in a randomized block design with a 2 × 2 factorial arrangement of treatments. Treatment diets were either a FAS [1. Read More

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Inclusion of Oat and Yeast Culture in Sow Gestational and Lactational Diets Alters Immune and Antimicrobial Associated Proteins in Milk.

Animals (Basel) 2021 Feb 14;11(2). Epub 2021 Feb 14.

Department of Animal Sciences, North Carolina A&T State University, Greensboro, NC 27411, USA.

Maternal diet supplementation with pro- and prebiotics is associated with decreased incidence of diarrhea and greater piglet performance. This study investigated the impact adding whole ground oat as a prebiotic, alone or in combination with a probiotic, yeast culture (YC) (), to sow gestation and lactation rations had on milk protein composition, piglet growth, and incidence of post-weaning diarrhea (PWD). Diets: control (CON), CON + yeast culture (YC) [5 g/kg], CON + oat (15% inclusion rate) (Oat) or CON+ YC [5 g/kg] + Oat (15%) were fed the last 30 days of gestation and throughout lactation (18-21 days). Read More

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February 2021

Fermented Soybean Meal Affects the Reproductive Performance and Oxidative Status of Sows, and the Growth of Piglets.

Animals (Basel) 2021 Feb 24;11(3). Epub 2021 Feb 24.

School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai Key Laboratory of Veterinary Biotechnology, Shanghai 200240, China.

This study aimed to investigate the effect of the fermented soybean meal on the reproductive performance, oxidative stress and colostrum composition of sows, and the growth performance of their progeny. A total of 44 sows were allotted to four dietary groups ( = 11/group). The dietary groups included the basal diet group (control) and the treatment groups in which soybean meal in the basal diet was replaced with 2%, 4%, and 6% fermented soybean meal, respectively. Read More

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February 2021

Prediction of Lactational Milk Yield of Cows Based on Data Recorded by AMS during the Periparturient Period.

Animals (Basel) 2021 Feb 3;11(2). Epub 2021 Feb 3.

Department of Animal Biotechnology and Genetics, Faculty of Animal Breeding and Biology, UTP University of Science and Technology, 85-084 Bydgoszcz, Poland.

Early prediction of lactation milk yield enables more efficient herd management. Therefore, this study attempted to predict lactation milk yield (LMY) in 524 Polish Holstein-Friesian cows, based on information recorded by the automatic milking system (AMS) in the periparturient period. The cows calved in 2016 and/or 2017 and were used in 3 herds equipped with milking robots. Read More

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February 2021

Lemongrass supplementation to Farafra ewes improved feed utilization, lactational performance and milk nutritive value in the subtropics.

Anim Biotechnol 2021 Feb 2:1-10. Epub 2021 Feb 2.

Department of Animal Production, Faculty of Agriculture, New Valley University, New Valley, Egypt.

Application of phytogenic feed additives in livestock production is a sustainable practice and the search for more phytogenic options continues. This study was conducted to investigate the impact of lemongrass supplementation on nutrient utilization, rumen fermentation and milk production and composition. Thirty gestating Farafra ewes were randomly assigned to three experimental treatments of control (without a supplement), or with the supplementation of 5 g (LEM5 treatment), or 10 g of lemongrass/ewe/d (LEM10 treatment) for 12 weeks. Read More

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February 2021

Effects of the macroalga Asparagopsis taxiformis and oregano leaves on methane emission, rumen fermentation, and lactational performance of dairy cows.

J Dairy Sci 2021 Apr 28;104(4):4157-4173. Epub 2021 Jan 28.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

Asparagopsis taxiformis (AT) is a source of multiple halogenated compounds and, in a limited number of studies, has been shown to decrease enteric CH emission in vitro and in vivo. Similarly, oregano has been suggested as a potential CH mitigating agent. This study consisted of 2 in vitro and 2 in vivo experiments. Read More

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Abomasal infusion of ground corn and ammonium chloride in early-lactating Holstein-Friesian dairy cows to induce hindgut and metabolic acidosis.

J Dairy Sci 2021 Apr 21;104(4):4174-4191. Epub 2021 Jan 21.

Wageningen Livestock Research, Wageningen University & Research, 6700 AH, Wageningen, the Netherlands.

Next to rumen acidosis, other forms of acidosis may also affect lactational performance of cows. Therefore, the effects of hindgut acidosis, induced via abomasal infusion of ground corn, and metabolic acidosis, induced via abomasal infusion of NHCl, were studied in cows in early lactation. Observations were made on intake and digestibility of nutrients, lactation performance, energy and N partitioning, blood acid-base status, and rumen and hindgut fermentation characteristics. Read More

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Lactational performance, enteric gas emissions, and plasma amino acid profile of dairy cows fed diets with soybean or canola meals included on an equal protein basis.

J Dairy Sci 2021 Mar 15;104(3):3052-3066. Epub 2021 Jan 15.

Department of Animal Science, The Pennsylvania State University, University Park 16802. Electronic address:

This study investigated the effects of feeding solvent-extracted canola meal (CM), extruded soybean meal (ESBM), or solvent-extracted soybean meal (SSBM) on an equivalent crude protein basis on performance, plasma AA profiles, enteric gas emissions, milk fatty acids, and nutrient digestibility in lactating dairy cows. Fifteen Holstein cows (95 ± 20 d in milk) were used in a replicated 3 × 3 Latin square design experiment with 3 periods of 28 d each. Treatments were 3 diets containing 17. Read More

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Performance and Milk Composition of Nubian Goats as Affected by Increasing Level of Microalgae.

Animals (Basel) 2020 Dec 21;10(12). Epub 2020 Dec 21.

Department of Animal Production, Faculty of Agriculture, New Valley University, New Valley 72511, Egypt.

Fat supplementation affects the lactational performance of goats and dramatically changes milk nutritive value. In the present experiment, two levels of microalgae, a natural source of rumen-protected eicosapentaenoic acid (EPA), were studied in the diet of Nubian goats. Using quintuplicated 3 × 3 Latin square design, fifteen lactating goats, (14 ± 2 months old and 33. Read More

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December 2020

Effects of Cold Exposure on Some Physiological, Productive, and Metabolic Variables in Lactating Dairy Goats.

Animals (Basel) 2020 Dec 11;10(12). Epub 2020 Dec 11.

Grupo de Investigación de Rumiantes (G2R), Departamento de Ciencia Animal y de los Alimentos, Universitat Autònoma de Barcelona, 08193 Barcelona, Spain.

Low winter temperatures in some regions have a negative impact on animal performance, behavior, and welfare. The objective of this study was to evaluate some physiological, metabolic, and lactational responses of dairy goats exposed to cold temperatures for 3 weeks. Eight Murciano-Granadina dairy goats (41. Read More

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December 2020

Influence of fiber degradability of corn silage in diets with lower and higher fiber content on lactational performance, nutrient digestibility, and ruminal characteristics in lactating Holstein cows.

J Dairy Sci 2021 Feb 11;104(2):1728-1743. Epub 2020 Dec 11.

William H. Miner Agricultural Research Institute, Chazy, NY 12921. Electronic address:

The effect of neutral detergent fiber (NDF) degradability of corn silage in diets containing lower and higher NDF concentrations on lactational performance, nutrient digestibility, and ruminal characteristics in lactating Holstein cows was measured. Eight ruminally cannulated Holstein cows averaging 91 ± 4 (standard error) days in milk were used in a replicated 4 × 4 Latin square design with 21-d periods (7-d collection periods). Dietary treatments were formulated to contain either conventional (CON; 48. Read More

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February 2021

Relative availability of metabolizable methionine from 2 ruminally protected sources of methionine fed to lactating dairy cattle.

J Dairy Sci 2021 Feb 25;104(2):1811-1822. Epub 2020 Nov 25.

Department of Animal Sciences and Industry, Kansas State University, Manhattan 66506. Electronic address:

Our objective was to evaluate the lactational responses of dairy cows to methionine provided from 2 ruminally protected sources of methionine activity. Twenty-one Holstein dairy cows [11 primiparous (634 kg of body weight, 140 d in milk) and 10 second-parity (670 kg of body weight, 142 d in milk)] were assigned to a treatment sequence in 4 replicated 5 × 5 Latin squares plus 1 cow, with 14-d periods. Treatments were as follows: control; 7. Read More

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February 2021