|تعداد مشاهده مقاله||106,284,779|
|تعداد دریافت فایل اصل مقاله||83,178,350|
Evaluation of Biochemical and Hematological Parameters in Postpartum Holstein Dairy Cows Following Supplementation of Immunofin® Herbal Extract
|Iranian Journal of Veterinary Medicine|
|مقاله 7، دوره 16، شماره 3، آبان 2022، صفحه 274-287 اصل مقاله (1.33 M)|
|نوع مقاله: Theriogenology and Reproduction|
|شناسه دیجیتال (DOI): 10.22059/ijvm.2022.334623.1005210|
|Maziar Kaveh Baghbadorani1؛ Jaleel Mehrzad2؛ Mahdi Vodjgani* 1؛ Alireza Khosravi3؛ Vahid Akbarinejad1|
|1Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran|
|2Department of Microbiology and Immunology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran|
|3Department of Mycology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran|
BACKGROUND: The incidence of diseases among dairy cows is high in the postpartum period, which reduces dairy enterprise and higher demands for antibiotics. Considering this, the notion of promoting heath and reducing antibiotic application in dairy cow medicine by taking advantages of bioactive phytochemicals in herbal extracts is emerging.
OBJECTIVES: This study's main purpose was to investigate the effects of supplementing Holstein dairy cows' ration in the close-up period by Immunofin® polyherbal aqueous extract on the normal physiology, clinical health, and hematological and biochemical parameters of postpartum dairy cows.
METHODS: In this experiment, the herbal extract was supplemented in a close-up period diet for cows in the treatment group (n=10). However, cows in the control group (n=10) received precisely the same ratio as the placebo. The clinical health of cows was assessed, and some of their biochemical and hematological parameters were com-pared between the two groups.
RESULTS: Cows in the treatment group had a lower incidence of retained fetal membrane and metritis (P=0.01). In addition, cows in the treatment group had a lower concentration of serum nonesterified fatty acid (P<0.001), and a lower number of peripheral blood leukocytes and lymphocytes count among cows in the treatment group (P<0.0001). In contrast, their mean corpuscular hemoglobin and mean corpuscular volume were higher (P<0.0001).
CONCLUSIONS: In conclusion, Immunofin® supplementation in a close-up period had no negative impacts on prepartum cows' clinical health and could desirably alter some of the clinical, biochemical and hematological pa-rameters.
تازه های تحقیق
|Clinical health؛ Immunofin؛ Metabolic status؛ Polyherbal extract؛ Transition period|
|عنوان مقاله [English]|
|ارزیابی پارامترهای بیوشیمیایی و هماتولوژیک در گاوهای هلشتاین تازه زا پس از افزودن عصاره گیاهی ایمونوفین به جیره|
|مازیار کاوه باغبادرانی1؛ جلیل مهرزاد2؛ مهدی وجگانی1؛ علیرضا خسروی3؛ وحید اکبری نژاد1|
|1گروه مامایی و بیماری های تولیدمثل دام، دانشکده دامپزشکی، دانشگاه تهران.|
|2گروه میکروبیولوژی و ایمونولوژی، دانشکده دامپزشکی، دانشگاه تهران، تهران، ایران.|
|3'گروه قار چ شناسی، دانشکده دامپزشکی ،دانشگاه تهران، تهران، ایران|
|زمینه مطالعه: بروز بیماری ها در گاوهای شیری در دوره پس از زایش زیاد است و این امر منجر به کاهش سودآوری گله های گاو شیری و افزایش نیاز به مصرف آنتی بیوتیک ها می گردد. با توجه به این امر، ایده بهبود سلامت و کاهش مصرف آنتی بیوتیک ها در طب گاو شیری با بهبره بردن از ترکیبات زیست فعال موجود در عصاره های گیاهی رو به گسترش می باشد. |
هدف: هدف اصلی این مطالعه بررسی تاثیر اضافه نمودن عصاره گیاهی آبی ایمونوفین (شرکت پارس ایمن دارو) به خوراک آن ها در دوره کلوزآپ بر فیزیولوژی طبیعی، سلامت بالینی و پارامترهای بیوشیمیایی و هماتولوژیک گاوهای تازه زا می باشد.
روش کار: در این مطالعه، طی دوره کلوزآپ ایمونوفین به خوراک گاوهای تیمار (10 راس) اضافه شد در حالی که گاوهای گروه شاهد (10 راس) جیره ایی مشابه را با دارونما دریافت کردند. سلامت بالینی گاوها و شاخص های بیوشیمایی و هماتولوژیک بین دو گروه مقایسه شد.
نتایج: نرخ بروز جفت ماندگی و متریت در گاوهای گروه تیمار کمتر از گروه شاهد بود (0.01 =P) به علاوه غلظت اسیدهای چرب غیر استریفیه در گروه درمان پایینتر از گروه کنترل بود (0.001 >P). گاوهای گروه تیمار لمفوسیت ها و لوکوسیت های کمتری را در خون خود داشتند (0.0001 >P) در حالی که وزن متوسط هموگلوبین گویچه ایی و حجم متوسط گلبول های قرمز در آن ها بیشتر بود (0.0001 >P).
نتیجه گیری نهایی: اضافه نمودن ایمونوفین به جیره دوره کلوزآپ گاوها نه تنها اثری منفی بر سلامت بالینی آن ها ندارد بلکه می تواند برخی از شاخص های بالینی، بیوشیمیایی و هماتولوژیک گاوهای تازه زا را بهبود بخشد.
|سلامت بالینی, ایمونوفین, وضعیت متابولیک, عصاره گیاهی, دوره انتقال|
The transition period is one of the most challenging stages in the lifetime of dairy cows, as 30 to 50% of high producers may be affected by one or more peripartum diseases. (Leblanc, 2010) Considering the impact of postpartum cow health in achieving maximum production potential and enhancing economic profitability, it is essential to recognize related risk factors of diseases (Stevenson, 2020). Because of reducing dry matter intake and concurrent increasing energy demands and incompetency of the immune system due to physiologic, endocrine changes, metabolic challenges, and energy deficit are the main predisposing factors, and the critical role of metabolic and immune status in maintaining postpartum health has been revealed in recent years (Bicalho, 2016, Jahan et al., 2020).
Considering metabolic status, a high concentration of β-hydroxybutyrate (BHBA) and non-esterified fatty acid (NEFA) has been reported to be linked with significantly increased odds of developing postpartum clinical diseases, including retained fetal membrane, postpartum uterine infections (Qu et al., 2014; Chebel et al., 2021) and also culling (Seifi et al., 2011). Moreover, the prevalence of hepatic lipidosis is relatively high (Gonzaez et al., 2011), and a modified hepatic enzymes profile has been reported among cows with left displaced abomasum (Song et al., 2020). There are also reports about hematological changes and neutropenia in cows with a retained fetal membrane (Moretti et al., 2015), changed complete blood count in cows with metritis (Cui et al., 2019), and mastitis (Guan et al., 2020). One of the interesting fields of study in recent years is using phytochemicals to enhance a postpartum cow's health, immunity, and metabolic status (Alves et al., 2016; Lopreiato et al., 2020). Effects of alkaloid compounds in Chinese traditional herbal medicine (Shi et al., 2018), herbal derived antioxidant from green tea (Ma et al., 2021), and phytobiotic rich herbal extract on improving the metabolic status of dairy cows has been reported before (Hashemzadeh Cigari et al., 2014).
Immunofin® polyherbal extract (Pars Imendaru CO., Iran) is the commercial mixture of purified bioactive phytochemicals obtained from several medicinal plants, including coneflower (Echinacea purpurea), rosemary (Rosmarinus officinalis), thyme (Thymus vulgaris) and yarrow (Achillea millefolium). Based on manufacturer-provided information, the most important bioactive phytochemical ingredients of the extract are alkamides and alkylamides (isobutylamide, N-methylbutylamine, etc.), polysaccharides (Echinacin, arabinogalactan, xylogalactan), glycosides (caffeic acid and its derivates including rosemarinic acid, chicoric acid, echinacoside), and terpenes (carnosic acid, citronellol, humulene, and caryophyllene). Biologic effects of each compound have been discussed in previous papers (Andrade et al., 2018; Bruni et al., 2018; Gedikoğlu et al., 2019). In this study, we supplemented Immunofin® to close-up period ration to investigate its effect on clinical health, metabolic status, and hematologic indices of postpartum cows.
Materials and Methods
Animal Selection and Experimental Design
This study was conducted under heat stress conditions (THI>72) during July and August 2020 in a large industrial dairy farm with 2500 milking cows and an average daily milk yield of 39 kg per cow, located in Malayer, Hamedan province, Iran. Based on our inclusion criteria, pregnant cows on days 245 to 252 of their pregnancy were selected at the beginning of the close-up period. Selected cows (n=20) had a parity number of 1 or 2, a body condition score of 3 to 4, a locomotion score of 1 or 2, and they were healthy and free of any abnormal clinical signs. Cows were kept separately in the same open shed stalls during the experiment. Provided stalls had sandy bedding and cooling equipment, including ceiling fans and sprinklers. All cows were fed twice daily with the same diet during close-up (and in the postpartum period) based on TMR ingredients exceeding the nutritional requirements of cows (Table 1). Moreover, selected cows were vaccinated against FMD, brucellosis, blackleg, and lumpy skin disease according to the standard vaccination program of dairy herds.
Table 1. Dietary ingredients of the ration used to feed the cows in both groups of the study (Dry matter basis).
1Coposition: 3000 ppm of Niacin/kg, 15000 ppm of Choline/kg, 5000 ppm of Chorome/kg.
2Coposition:290000 ppm of Ca/kg, 15300 ppm of Mg/kg, 8500 ppm of Mn/kg, 11250 ppm of Zn/kg, 3200 ppm of Cu/kg, 190 ppm of I/kg, 105 ppm of Co/kg, 10000 IU of vitamin A/kg, 250000 IU of vitamin D/kg, 1200000 IU of vitamin E/kg.
Selected cows were randomly allocated to the Immunofin® treatment group (n=10) or served as the control (n=10). Cows in the treatment group received daily 150 mL of pure extract of Immunofin® (Pars Imendaru CO. Iran) in their diet for 21 days of the close-up period. In order to reach enough volume for mixing in the ration, supplementation was done by diluting 1.5 L of Immunofin® with the same volume of drinking water in 1:1 ratio and then pouring of prepared solution into the cows' TMR diet, mixing it manually immediately at the time of feeding. Cows in the control group received exactly the same ratio as the placebo.
The clinical part of the study was done by comparing the incidence of postpartum uterine disease (retained fetal membrane and metritis) and assessing general health and the amount of dry matter intake (DMI) in the close-up period between study groups. The average dry matter intake (DMI) of cows in each group was calculated by analyzing and subtracting the dry matter content of leftover feed in the feed bank from the dry matter content of provided feed per cow daily. Rumen scoring was done daily, based on 1-5 scale and assessment of rumination was done three times a day, two hours after feeding. Moreover, consistency and digestion scoring of the cows' manure was assessed daily according to 1-5 scale scoring system.
Blood sampling and Hematology
Blood sampling from the jugular vein was done using plain, and EDTA contained venoject tubes. Blood samples were collected from each cow at the beginning time of the study (week -3 or 3 weeks before calving), a week before calving (Week -1), and the first (Week +1), second (Week +2), and third week (Week +3) postpartum. Hematological indices, including the number of white and red blood cells per microliter (μL), hemoglobin concentration, hematocrit, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC), were evaluated. In order to perform the assessment, 10 μL of blood taken from EDTA venoject tubes was analyzed by a fully automated hematology analyzer device, Celltac alpha, model MEK-6550 (NIHON KOHDEN®, Tokyo, Japan), according to the manufacturer's recommended procedure of calibration and applying the special hemolyzing reagent, diluent, and detergent. Differential blood count (Lymphocytes, Monocytes, Eosinophils, Polymor-phonuclears, Band cells) and neutrophil to lymphocyte ratio (NLR) were also evaluated by manual microscopy of prepared Giemsa stained (Sigma-Aldrich®) blood smears under oil immersion objective lens 100X magnification.
Serum Biochemistry and Evaluation of the Metabolic Status
Centrifugation of clotted blood was done at 1000 X g at 4oC for 20 minutes. Separated serum was aspirated from the supernatant by pipette without disturbing the sediment and then transferred to a sterile 10 mL plastic test tube. Samples were stored at – 80oC until the time of analysis. Several biochemical parameters, including the concentration of Non-esterified fatty acids (NEFA), β-hydroxybutyric acid (BHBA), Alanine aminotransferase (ALT), Aspartate aminotransferase (AST) in serum, were analyzed by automated biochemistry analyzer (Hitachi 911 Analyzer, Roche diagnostic) according to manufacturer provided reagents and recommended procedures for enzymatic colorimetric method.
Statistical analysis of provided data was done by SAS software (version 9.2, SAS Institute Inc., Cary, NC). Statistical analyses of binary variables were done using the FREQ procedure and Chi-squared test. For analyses of numerical data, first, normality was tested by GLM procedure and Kolmogorov-Smirnov test, and then based on normality test results, TTEST or Mann-Whitney U test was done for comparing two groups. Analyses of related numerical data in different time sessions were done by applying the GLM procedure and repeated measures ANOVA. Significance was declared at P-value< 0.05 and tendency was defined at 0.05 <P<0.1.
Meticulous clinical observations on a daily basis indicated normal appetite, normal rumen score (score 4), rumination behavior and normal consistency (score 4), and digestibility score (score 3) of cow's manure in the treatment group. Based on these findings, the administered herbal supplement had no adverse effects on the normal digestive physiology of treated cows. No cows with clinical signs of indigestion or other health problems were seen during the study. One of the cows in the control group was deleted from the study because of developing non-responding to downer cow syndrome and being culled following parturition.
The average length of pregnancy (P=0.65) and sex ratio of born calves (P=0.8) were similar between the two groups. The birth weight of born calves from cows in the treatment group was significantly higher than those born from cows in the control group (40.2±1.05 vs. 39.4±2.42, respectively, P=0.03). Cows in the treatment group tended to have a significantly higher yield of colostrum (P=0.086) by providing 5.3±0.73 liters of colostrum on average with Brix of 28.6±1.25, in the first postpartum milking session, compared to cows in the control group with 3.55±0.41 liters of colostrum and Brix of 27.6±0.81.
Based on provided data, the average DMI of cows in the treatment group during the close-up period was numerically higher (13.34 ±0.44 vs.12.1±0.6 respectively) than cows in the control group. Still, the difference was not statistically significant (P=0.1). Four out of 9 cows (44%) in the control group were affected by the retained fetal membrane and puerperal metritis. In contrast, none of the cows in the treatment group suffered from these postpartum uterine complications (P=0.01).
The serum concentration of NEFA was higher among cows in the control group compared to cows in the treatment group (P=0.033, Figure 1). Regardless of the group, NEFA was higher in the first and second week postpartum than in other time sampling sessions (P<0.05). The concentration of BHBA and ALT was not influenced by the effect of group, time, and interaction of group by time (P> 0.05). However, the concentration of AST was higher in week +1 compared to week -3, week -1, and week +3 (P<0.05) (Table 2).
Table 2. Mean± SEM of serum concentration of BHBA (mmol/L), ALT (U/L), and AST (U/L) of the cows in the treatment and control group in different time sessions
Compared to the control group, white blood cells (WBC) and blood lymphocytes counts were lesser in the treatment group (P<0.0001, Figure 2 and Table 3). Moreover, WBC and blood lymphocyte counts in both groups were lesser in week +1 than week -1 and +3 (P<0.05). Monocyte count was higher in week -1 than in weeks -3 and +2 (P < 0.05), and eosinophil count was higher in week -1 than in week -3 and week +2 (P=0.011) in both groups. Granulocyte count was not influenced by the effect of group, time, and interaction of group by time (P>0.05). Band cells count was higher in week +2 than weeks -1 and +1, regardless of the group (P<0.05, Table 3). The effect of the group (P=0.19), time (P=0.17), and interaction of group and time (P=0.33) on neutrophils to lymphocytes ratio (NLR) were not significant (Figure 3). Furthermore, mean corpuscular hemoglobin (MCH) and mean corpuscular volume (MCV) was lesser in the control than in the treatment group (P<0.0001, Figures 4 and 5). Regardless of group, MCH was lesser in week -3 and week -1 than in weeks +1, +2, and +3 (P<0.001). Contrary to MCH, red blood cells count, hemoglobin concentration, and hematocrits were higher in week -3 and week -1 than in week +1, week +2, and week +3 (P<0.01). Moreover, all these three indices were higher in week+1 than week+3 (P<0.05). Mean corpuscular volume (MCV) was higher in week +1 than in other time sessions of the study (P<0.05), and mean corpuscular hemoglobin concentration (MCHC) was lower in week -1 than in week +2 and week +3 (P<0.05), and in week+1 compare to week+3 (P=0.007), irrespective of the group (Table 4).
Table 3. Mean ±SEM of blood lymphocyte, monocyte, granulocyte, band cell, and eosinophil count per uL of the cows' blood in the treatment and control group in different time sessions
Table 4. Mean ±SEM of Mean corpuscular hemoglobin concentration (g/dl), RBC (106/uL), Hematocrit (%) and Hemoglobin (g/dl) of the cows in the treatment and control group in different time sessions.
The manufacturer generally recommends Immunofin® for enhancing calf health and reducing the incidence of calfhood diseases. In previous studies, considering the positive effect of some of its ingredients on dairy cows' health, we decided to supplement it as an extra-label herbal medicine to the ration of heat-stressed cows during the close-up period. Heat stress exacerbates metabolic complications and health problems in postpartum dairy cows (Skibiel et al., 2017); therefore, heat stress condition was selected for conducting this study to evaluate the efficacy of Immunofin® in improving metabolic status and health of postpartum cows in the condition which is mostly needed.
The incidence of retention of fetal membrane (RFM) and metritis among cows in the treatment group showed significant reduction. There are several reports about successful usage of herbal medicine in prevention of RFM and metritis (Cui et al., 2015; Cui et al., 2019). It was reported that prepartum lower amount of DMI together with higher serum concentration of NEFA and proinflammatory cytokines are risk factors of developing RFM and metritis (Qu et al., 2014; Dervishi et al., 2016). Immunofin effects on DMI and its modulating impact on proinflammatory cytokine could attenuate both of these risk factors and reduce the incidence of RFM.
Cows in the treatment group consumed 1.24 Kgs more dry matter compared to cows in the control group in the close-up period. An increase of DMI could be the consequence of higher palatability of treatment group ration because of pleasant Immunofin® flavor for cows, improved digestibility of consumed ration in rumen caused by polyphenols (Loperiato et al., 2014), and stimulatory effect of bioactive alkylamides compounds on appetite, through activation of brain CB1 cannabinoid receptors which trigger orexigenic signals (Kirkham et al., 2005; Raduner et al., 2006; Koch et al., 2017). Despite lacking statistical significance, higher DMI by treatment group cows in the prepartum period has substantial importance, as it was reported that each 0.1-percentage point reduction in the average DMI%BW and each 1-Mcal decline in the average energy balance in the last 3 d prepartum increased the odds of having clinical mastitis by 10 and 8%, respectively (Pérez-Báez, et al., 2019). Moreover, it has been reported that decreased dry matter intakes, particularly in a week before calving, increased the risk of developing metritis in the postpartum period.
The lower postpartum concentration of NEFA in treatment group cows, especially in the first two weeks after calving, might be due to their higher prepartum dry matter intake, which reduced the mobilization of body fat by them. In addition, the positive effect of thyme on rumen fermentation and the ratio of acetate to propionate was reported before (Vakili et al., 2013; Castro Filho et al., 2021). Previous studies reported the association of high serum level peripartum NEFA and AST with increased risk of postpartum diseases in fresh cows. This elevated risk of postpartum complications may be linked to the destructive effects of NEFA on neutrophils' function and viability (Hammon et al., 2006). Although impairment of neutrophils function under the presence of a high level of NEFA is proven, there is no consensus about the exact mechanism of NEFA-induced functional incompetency of polymer-phonuclears. In contrast to previous reports about reduced ROS production and NETs formation, recent experiments revealed that overreacting of inflammatory pathways, overproduction of proinflammatory cytokines (Korbechi et al., 2019), and excessive production ROS in neutrophils may be the result of impaired function of neutrophils (Scalia et al., 2006; Zhang et al., 2018; Leblanc et al., 2020).
Regardless of the group, NEFA was higher in the first and second week postpartum compared to other time sessions. This is in accordance with a previous report about the presence of negative energy balance in the first three weeks after calving and lagging increase of DMI compared to energy demand. Similarly, irrespective of group, serum concentration of AST was higher in the first week postpartum than before calving and the third week postpartum, which may indicate hepatic damage due to metabolic load at the time of parturition. The effect of Echinacea extract itself on hepatic health is controversial. While there are some reports about the positive effect of Echinacea in the prevention and treatment of hepatic diseases (Manayi et al., 2015; Xu et al., 2021), others reported hepatotoxicity caused by them (Abdel-Salam et al., 2012; Gabrains et al., 2015; Lawrenson et al., 2015). According to provided results, there was no significant increase in serum levels of ALT and AST during this study following Immunofin® supplementation. Although dosage and time length of treatment might play a role in how Echinacea extract affects the liver, lacking hepatic damage may occur because of hepatoprotective effects of rosemary and thyme (Domitrović et al., 2013; Rašković et al., 2015).
Provided results by our study demonstrate a lower count of peripheral blood leukocytes and lymphocytes in cows of the treatment group. Blood lymphocytes are the dominant subpopulation of an adult cow's normal leukogram (Roland et al., 2014). Since counts of other subpopulations of leukocytes didn't differ between the two groups of the study, lower leukocytes count in Immunofin® treated cows was due to a lower number of peripheral lymphocytes. Most of the previously conducted studies in other species reported an increased count of leukocytes following treatment with Echinacea extract (Mishima et al., 2004; Abouelella et al., 2007; Xu et al., 2021). Contrary to these results, there are several reports indicating the occurrence of leukopenia following long term treatment with Echinacea extract and the immunosuppressive effect of its lipophilic alkylamides through decreasing the count of lymphocytes (Kemp et al., 2002; Mattias et al., 2008; Balčiūnaitė-Murzienė et al., 2021). We did not observe any signs of leukopenia in treated cows, as their count of leukocytes was within the normal range. Considering this, a lower count of leukocytes among treated cows should be interpreted as the presence of leukocytosis among cows in the control group. This pathological leukocytosis might have occurred following the occurrence of clinical infectious diseases, including metritis among these cows. Regardless of group, peripheral blood leukocytes and lymphocytes were lesser in the first week postpartum than in the second session of sampling (two weeks after the beginning of the study) and third week postpartum. This changing pattern of WBCs and lymphocyte number might occur due to cortisol-induced stress leukogram at the time of parturition. It has been reported that NLR in the peripartum period is elevated among cows with a high level of SCC. The altered cytokines milieu and proinflammatory cytokines profile is considered a possible cause (Guan et al., 2020). Based on our findings, Immunofin® had no significant effect on NLR, but in contrast to the control group, the changing pattern of NLR in the treatment group was decreasing (Figure 3), which may decrease the risk of postpartum infectious disease diseases.
Reduction of MCH and MCV and reaching the lowest level in 30 days after calving in dairy cows was reported before (Painao, et al., 2020). The underlying pathophysiology might be due to an increased postpartum inflammatory state and intense body fat mobilization that suppress hematopoiesis due to iron deficiency (Ganz et al., 2009; Contreras et al., 2011; Bradford et al., 2015). It has been reported that iron deficiency anemia impairs cell-mediated immunity, and hence normal hematological indices are an important prerequisite of the competent immune response (Das et al., 2014). Mean corpuscular hemoglobin and mean corpuscular volume were significantly higher in the treatment group; this may indicate a controlled postpartum inflammatory state and reduced body fat mobilization among cows in the treatment group; a hypothesis which is supported by the evidence like lower WBCs in peripheral blood and lower serum NEFA concentration in these cows. These differences also could be explained by the hematopoietic effects of Echinacea. Similar effects were reported in other species treated by oral supplementation of Echinacea extract (O'Neill et al., 2002). Higher erythrogram in cows with better postpartum reproductive performance and lower erythrogram values in cows with retained fetal membrane was reported (Nazifi et al., 2008; Saut et al., 2008). Considering this, a lower incidence of RFM in the treatment group might be associated with Immunofin induced changes in the erythrogram.
Oral supplementation of Immunofin® polyherbal extract for three weeks in a close-up period TMR had no negative clinical impact on the health of postpartum Holstein dairy cows and elicited some positive effects, including significantly decreased NEFA and reduced incidence of postpartum uterine diseases.
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. The authors gratefully acknowledge collaboration from management of Ferdows Pars agriculture and livestock holding CO. and Pars Imendaru CO. for providing polyherbal extract.
Conflict of Interest
The authors declared no conflict of interest.
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