Type Of Birth Research Articles

Factors affecting average daily gain in Sonadi sheep

Data on 1408 Sonadi lambs born during 2012 to 2019 at ICAR-Mega Sheep Seed Project, College of Veterinary and Animal Science, Navania (Rajasthan) were analyzed to assess the effect of period, season, sex and type of birth on average daily gain (ADG) traits. The overall least squares means for ADG were 77.69±3.53, 48.81±3.04, 34.09±3.04 and 55.22±4.06 g for ADG1 (0–3M), ADG2 (3–6M), ADG3 (6–9M) and ADG4 (9–12M), respectively. Period and sex of lamb had significant (p<0.01) effect on all ADG traits. Season of birth had significant (p<0.01) effect on ADG4 only. Type of birth had significant (p<0.05) effect on ADG1 only. Heritability estimates for ADG1, ADG2, ADG3 and ADG4 were 0.77±0.17, 0.24±0.09, 0.41±0.13 and 0.07±0.11, respectively. Genetic correlation was negative between ADG1 and ADG3 as well as between ADG1 and ADG4 whereas positive among other ADGs. The estimates of phenotypic correlations among average daily gain were negative and low to high. The results indicated that growth rate in Sonadi lambs was higher during pre-weaning age which declined with advancement of age. To improve the performance, the environmental factors should be given weightage in the management of flocks.

SNP arrays evaluation as tools in genetic improvement in Corriedale sheep in Uruguay

One control strategy for gastrointestinal nematodes (GIN) is genetic selection. This study´s objective was to compare eggs per gram of feces (FEC) and fiber diameter (FD) estimated breeding values (EBV) and genomic EBV (GEBV) in Corriedale breed. Analysis included 19547 lambs with data, and 454, 711 and 383 genotypes from 170, 507 and 50K SNP chips, respectively. A univariate animal model was used for EBV and GEBV estimation, which included contemporary group, type of birth and dam age as fixed effects, and age at recording as covariate. Differential weights (α) were considered in the genomic relationship matrix (G), and the best fit models were identified using Akaike´s Information Criterion (AIC), which were later used for GEBV and accuracies estimation. The use of α only impacted on low density SNP chips. No differences were observed in mean accuracies for the whole population. However, in the genotyped subgroup accuracies increased by 2% with the 170 SNP chip (α=0.25), and by 5% (α=0.5) and 14% (α=0.75) with the 507 SNP chip. No differences were observed in FD EBV and GEBV mean accuracies. These results show that it is possible to increase GEBV accuracies despite the use of low-density chips.

Determination of the Eff ects of Silage Type, Silage Consumption, Birth Type and Birth Weight on Fattening Final Live Weight in Kıvırcık Lambs with MARS and Bagging MARS Algorithms

Determination of the Eff ects of Silage Type, Silage Consumption, Birth Type and Birth Weight on Fattening Final Live Weight in Kıvırcık Lambs with MARS and Bagging MARS Algorithms

Cox Proportional Hazard Model for Survival Time of Neonatal Mortality in Neonatal Intensive Care Unit of Hospitals in River Nile State-Sudan

Cox Proportional Hazard model is a popular statistical technique for exploring the relationship between the survival time of neonates and several explanatory variables. It provides an estimate of the study variables’ effect on survival after adjustment for other explanatory variables, and allows us to estimate the hazard (or risk) of death of newborn in NICU of hospitals in River Nile State-Sudan for the period (2018-2020). Study Data represented (neonate gender, mode of delivery, birth type, neonate weight, resident type, gestational age, and survival time). Kaplan-Meier method is used to estimate survival and hazard function for survival times of newborns that have not completed their first month. Of 700 neonates in the study area, 25% of them died during 2018-2020. Variables of interest that had a significant effect on neonatal death by Cox Proportional Hazard Model analysis were neonate weight, resident type, and gestational age. In Cox Proportional Hazard Model analysis all the variables of interest had an effect on neonatal death, but the variables with a significant effect included, weight of neonate, resident type and gestational age.

Marker-assisted introgression of myostatin from Texel to Ramlıç sheep: Growth and real-time ultrasound carcass traits in F1 and BC1 lambs

The aim of the study was to evaluate live weights, body measurements, and real-time ultrasound carcass traits of F1 and BC1 genotypes in a marker assisted introgression (MAI) process. Effects of some factors on live weight and body measurements including ultrasonographic assessments in Musculus longissimus dorsi (MLD) were investigated at the F1 (n=51) and BC1 (n=99) cross lambs born in 2015 – 2017 period. Variance analysis showed that genotype had significant (P &amp;lt; 0.001) effect on pre- and post-weaning growth characteristics. The birth type had significant (P &amp;lt; 0.05) effect on pre- and post-weaning growth traits. Live weights at twelve months of age were higher in heavier born lambs. The growth performance of F1 lambs was between Texel and Ramlıç. Myostatin heterozygous BC1 lambs had been potentially heavier than the non-carriers and pure Texel. MLD depth and area were also statistically higher (P &amp;lt; 0.05) in BC1 lambs carrying myostatin than non - carriers. As a result, the beginning phase of introgression processes implemented was found to be successful

Kid growth performance and reproductive characteristics of Hair goats raised under breeder conditions

In the study, fertility parameters of Hair goats and the growth performance of kids raised under farmer conditions were investigated. The data of birth weight of 28,768 kids, the body weight of 27,541 kids aged d 90, and reproductive parameters of 26,693 does were used between 2013 and 2017 years. The birth weights of Hair goat kids born in 2013, 2014, 2015, 2016, and 2017 years were 2.36, 2.46, 2.56, 2.61, and 2.61 kg, whereas body weights detected on the d 90 were 15.2, 12.7, 12.8, 13.1, and 14.5 kg, respectively. Year, sex, birth type, and age of does affect significantly the birth and body weight of the kids on d 90 (p < 0.01). The survival rate detected on d 90 of kids was 100%, 98.7%, 94.5%, 93.9%, and 91.8% in 2013, 2014, 2015, 2016, and 2017 years, respectively. The effect of year on the viability of kids was found to be statistically significant (p < 0.01). Twinning rates of does were 3.5%, 5.7%, 9.5%, 12.4%, and 6.5%; kid yields per birth was 1.00, 1.00, 1.09, 1.12, and 1.00 in 2013, 2014, 2015, 2016, and 2017 years, respectively. The average birth rate was 91.9%, whereas the infertility rate was 8.1%. It was concluded that year, sex, and birth type influenced the kid growth performance of Hair goats due to variations in environmental factors such as management and feeding system. Therefore, if the management practices, nutrition, and health issues are improved, the growth performance of Hair goat kids and some reproductive parameters of Hair goats may be better.

The conservation method effects of the Barley-Vetch mixture planted together on theperformance of pregnant ewes

The aim of this study was to examine the effects of barley-vetch hay and barley-vetch silage on liveweight change in pregnant sheep and birthweight in lambs and to determine the optimal form of barley-vetch roughage usage in sheep feeding. Forty-eight (Kıvırcık x Akkaraman (G1) sheep were blocked according to age and randomly distributed to three groups: barley-vetch hay (H, n = 16), barleyvetch silage (S, n = 16), and the control group (C, n = 16). The H group was fed barley-vetch hay ad libitum and limited concentrate, the S group was fed barley-vetch silage ad libitum and limited concentrate, and the C group was fed barleygrass straw + alfalfa hay (50/50%) and limited concentrate feed. The trial was started in the final trimester period of the pregnancy and lasted 90 days. Liveweight and feed intake of the pregnant sheep were recorded in the last period of pregnancy. The liveweight of the lambs were measured at lambing and then on d 15 and 30. There is no diet effect on liveweights measure 1 and 2 months after lambing (p > 0.05). The liveweight value of sheep at lambing was 67.01 ± 1.32, 64.07 ± 1.54, and 64.89 ± 1.48 kg for the groups H, S, and C, respectively. The birth type was significant on birth weight (p < 0.05). Lamb liveweights on d 15 and 30 for the group H was greater than those for the group S (p < 0.05). Lambs' birth weight and weights on d 15 and 30 were 4.94 ± 0.13, 4.44 ± 0.15, and 4.77 ± 0.17 kg; 9.30 ± 030, 8.03 ± 0.30, and 8.94 ± 0.34, 13.36 ± 0.43, 10.85 ± 0.56, and 12.37 ± 041 for groups respectively. In conclusion, barley-vetch mixture can be used as hay and silage in pregnant sheep feeding, being hay superior to silage.

Metabolism of carbohydrates in low birth weight newborns at different types of feeding

Context: Preterm infants need plenty of energy and nutrients supplied by carbohydrates, in particular glucose. Aims: The aim was to study the associations of the carbohydrate content in blood and in feces with intrauterine growth retardation (IUGR) and different types of feeding in low birth weight (LBW) preterm infants. Subjects and Methods: This prospective study included 173 preterm infants with LBW, including those with IUGR. The dynamic monitoring of carbohydrates indicators in blood and feces, as well as the analysis of these parameters depending on the birth weight and type of feeding, have been performed. Results: Infants with LBW exhibited a higher excretion of carbohydrates with feces in preterm infants who received breast milk by the end of the neonatal period. The low level of glycemia in newborns during breastfeeding is explained by the fact that with this type of feeding the use of glucose is more intensive. Conclusions: LBW preterm infants had an increased level of carbohydrates in feces, which implied an enzymatic insufficiency that has persisted throughout the observation period. However, the level of excretion depended, first of all, on the type of feeding of the preterm infants. The level of hypoglycemia was significantly associated with the occurrence of IUGR.

Influence of non-genetic factors on body weight in Black Bengal goats maintained under field condition

Data recorded on 10,148 Black Bengal kids maintained at farmer’s herds in different districts of West Bengal from 2008 to 2019 were used to study the effect of non-genetic factors on body weight from birth to 12 months of age. The data were analysed using least squares technique. The effect of year of kidding on body weight of Black Bengal kids at different ages was significant (p&lt;0.05). Influence of season and parity of the dam had significant effect (p&lt;0.05) on body weight of kids from birth to 6 months of age. Sex of the kid significantly influenced body weight from birth to 12 months of age. Effect of types of birth on body weight at different ages up to 12 months of age of Black Bengal kids were significant (p&lt;0.05). Significantly higher body weight at birth was recorded in single born kid, followed by twin, triplets and so on.

Influence of some factors on fertility and weight if sheep and body weight development of lambs

The research included a total of 921 lambs, 474 ewes and 8 sjenicke sheep rams from 4 different farms. The aim of the research was to examine the influence of the farm, cultivation technology and the influence of rams within the farm on production indicators. Statistical analysis showed that the body weight of lambs at birth ranged from 3.37 to 4.03 kg (average 3.68 kg), at 30 days from 11.51 to 12.41 kg (average 12.07 kg) and from 90 days from 27.82 to 29 kg (average 28.65 kg). A statistically highly significant influence of the farm was determined (P&lt;0.01) on the body weight of lambs in all three control periods, as well as on the body weight of sheep and on the fertility of sheep. The influence of the ram on the body weight of the lambs at birth was statistically very significant within the farm (P&lt;0.01). When it comes to the percentage share of birth type by farm, farm 1 had the most singletons (59.13%) both within the farm and in comparison between other farms, while there were fewer twins (40.87%), and triplets were not identified. On the other farms, the percentage of twins was the highest, and triplets were also present, while on farm 4 there were also quadruplets, lambs born as quadruplets (3.28%).

Evaluation of genotype and nongenetic effects on some production traits: Comparison of Akkaraman and Bafra × Akkaraman B&lt;sub&gt;1&lt;/sub&gt; sheep genotypes

The purposes of this study were to evaluate genotype and some environmental effects on the reproductive and milk yield traits of sheep, and vitality and growth traits of lambs, and to compare the difference between Akkaraman (AKK) and Bafra × AKK B$_{1}$ (BA B$_{1}$: Bafra sires crossed BA F$_{1}$ ewes) genotypes in terms of these characters. Data were collected from 71 ewes for fertility traits and 37 ewes for milk yields in each genotype. Growth traits and survival rates of lambs were evaluated using 55 AKK and 56 BA B$_{1}$ lambs. AKK and BA B$_{1}$ ewes had 87.32% and 92.96% for lambing rate (p > 0.05), 125.35% and 161.97% for lamb production (p = 0.005), 1.45 and 1.74 for litter size (p = 0.072), respectively. Lactation milk yields and lactation lengths of those were determined as 109.46 ± 6.61 and 124.55 ± 7.26 kg (p > 0.05), and 155.76 ± 2.36 and 161.51 ± 2.43 days (p > 0.05), respectively. The survival rates and body weights of their lambs at weaning (90$^{th}$ day) were 87.27% and 87.50% (p > 0.05), and 27.77 ± 0.59 and 21.97 ± 0.59 kg (p = 0.000), respectively. In conclusion, the age of the dam affected the reproductive and milk yield traits, birth type affected the growth, and sex affected the survival rate and growth traits. Regarding the genotype effect, the BA BH$_{1}$ genotype had better reproductive and lactation milk yield, lower growth performance than those of the AKK genotype, and a similar survival rate to the AKK genotype.

Effect of

Context Spirulina platensis (SP) has been found to be an important dietary supplement for boosting animal growth performance, having a high protein content (60–70% on a dry-matter basis) with minimal toxicity. Aims The effect of Spirulina platensis (SP) supplementation on the growth and performance of two Omani goat breeds (Jabbali and Sahrawi) was investigated. Methods Thirty-six 11-month-old bucks from two Omani goat breeds were studied for 70 days at the Livestock Research Centre, Ministry of Agriculture, Fisheries and Water Resources, Oman. Each breed was divided into three groups (n = 6) and fed one of the following three rations: (1) control (CON): concentrate with 14% crude protein and 11.9% energy (MJ/kg DM); (2) Treatment 1 (T1): the same concentrate with 2 g/head.day SP; and (3) Treatment 2 (T2): the same concentrate with 4 g/head.day SP. Weekly growth, performance and body conformation data collected included live bodyweight (BWT), body condition score (BCS), average daily gain (ADG), chest girth (CG), wither height (WH) and body length (BL). Key results The Jabbali breed had a higher feed conversion ratio for T1 and T2 than did the Sahrawi breed. During the trial, no differences in total DM intake were found between treatments for either breed. T1 and T2 SP supplementation levels significantly (P &lt; 0.05) improved the BWT and ADG of the Sahrawi breed compared with the CON group. Analysis of all traits indicated a significant (P &lt; 0.05) effect of feeding spirulina on all the studied traits except WH and BL. ANOVAs for fixed effects in this study (dam age and kid birth type, i.e. single, twin or triple) were not significant (P &gt; 0.05) for any of the studied traits. However, the breed effect was highly significant (P &lt; 0.001) on BWT, ADG, BCS and treatment effect was significant (P &lt; 0.05) on CG traits. Conclusions Spirulina platensis could be used as a supplement feed to improve growth, performance and morphological traits in Omani goat production. Feeding spirulina to kids led to increased growth, herd performance and buck selection facilitation at an earlier age. Implications These findings will benefit Omani goat producers in managing productivity and product quality.

Influence of birth type on body weight of lambs from birth to weaning in various strains of sheep pramenka

The dynamics of increasing of bodyweight of lambs is conditioned by genetic factors, environmental factors and their interaction. The aim of this work was study variability of bodyweight of lambs related to type of birth of lambs in sheep genotype of four different strains of pramenka type and four growth stage: at the birth time, at the 30, 60 and 90 days of age after birth. For this investigation used lambs of four strains (Svrljiski, Pirotski, Sjeni?ki, Sarplaninski) of sheep type Pramenka (450 lambs per strain) for study dinamics of bodyweight at the time of birth, 30, 60 and 90 days after birth during three years of experiment (2011-2013). The results showed that the bodyweight of lambs born singles was higher than bodyweight of lambs born twins in studied four sheep genotypes i.e. Pirotski (4.00 kg : 3.40 kg), Svrljiski (3.90 kg : 3.79 kg), Sjeni?ki (3.73 kg : 3.61 kg), Sarplaninski (3.81 kg : 3.74 kg). The differences of bodyweight between lambs born singles and twins was significant for genotypes Pirot pramenka and Svrljig pramenka, on the level of significance for Sjenica pramenka and was not significant in Sarplanina pramenka. At the age of 30 days, the influence of birth type on the bodyweight of lambs was not statistically significant in any of the examined strains. The difference of bodyweight between singles and twins was statistically significant at the 60 days old of lambs in Svrljig pramenka and in lambs at 90 days old of Svrljig pramenka. On the base of results is established that type of born associated with significant differences of bodyweight at the birht time expressed later at the 60 and 90 day old lambs.

Some Fertility Traits and Growing Characteristics of Kivircik Sheep Breed in the Extensive Farm Conditions

In this study, fertility properties and growth traits of Kivircik sheep breed have investigated in Manisa province of Turkey. Fertility properties such as lambing rate, single birth rate, twins rate, litter size, vital rate and growth traits like birth weight, 30 days, 60 days, 120 days weights have calculated and distribution of growth traits according to sex and birth type has analyzed. In the first year of the trial; pregnancy rate, one birth rate, twin rate, litter size, survival rate has determined respectively 92.2%, 69.4%, 30.6%, 1.32 and 85.1%. In the same year, average birth weights of Kivircik male and female lambs are 4.08±0.74 kg and 3.93±0.69 kg, 30. day weights are 10.57±2.83 kg and 9.83±2.73 kg, 60. day weights are 21.32±10.36 kg and 19.66±5.46 kg, 120. day weights are 31.36±7.73 kg and 28.49±6.44 kg. In the second year of the trial; pregnancy rate, one birth rate, twin rate, litter size, survival rate has determined respectively 94.9%, 95.8%, 4.02%, 1.04 and 88.8%. In the same year, average birth weights of Kivircik male and female lambs are 4.22±0.91 kg and 4.00±0.73 kg, 30. day weights are 11.37±2.25 kg and 10.69±2.09 kg, 60. day weights are 22.75±4.49 kg and 21.37±4.18 kg, 120. day weights are 38.40±9.13 kg and 34.37±7.56 kg. At the end of the trial, fertility traits except twin birth rate and litter size has determined higher in II. year than I. year. This is likely due to higher live weight before mating and better herd management. Both two years, there were significant differences between growth traits (birth weight, 30 days weight, 60 days weight and 120 days weight) and sex or birth type.

Least Square Analysis of Variance for the Assessment of Natural Consequences for Birth Weight, Weaning Weight, Yearling Weight, Pre-weaning Daily Weight Acquire, and Greasy Fleece Weight of Kajli Sheep in Pakistan

The current study was completed to analyze the effect of natural components on various improvement affecting traits of Kajli sheep in Pakistan. For this reason, we apply two huge contemporary datasets in sheep to explore factors that influence the traits. Therefore, the generation information record of 13715 Kajli sheep lambing accumulated from 1994 to 2010 at Livestock Experimental Stations Khushab and Khizarabad, Punjab. Information records were genuinely analyzed through utilizing PC modified Mixed Model Harvey’s Least Squares and Maximum Likelihood. The two farms information data was analyzed by utilizing an animal model program. The factual model was incorporated to evaluate the Birth Weight (BW), 120 days at Weaning Weight (WW), Pre-Weaning Average Daily Gain (PRADG), Yearling Weight (YW) and Greasy Fleece Weight (GFW). Year of Birth (YOB), Birth Season (BS), Birth Types (BT) and sex was the fix effect in the model. Results indicated that, the overall general values for birth weight, weaning weight, yearling weight, pre-weaning weight and fleece weight were noted. Year of birth, type of birth, sex, and herd was influenced altogether significantly while, birth weight and greasy fleece weight, the period of birth showed no essential difference. In weaning weight and pre-weaning increment normally, year of birth, sort of birth and herd showed a critical contact except for sex. Male sheep were heavier than female sheep and single conceived sheep were also basically heavier than twins were during offspring birth. Results emulate that the Kajli sheep breed can be improved on through selection and further developed management. The cascade type of influence of the current investigation has levelheaded ramification not just for sheep farming by and by just as for intensified associate of boundaries which definitely convince deviation of weight, weight has become itself essential forecaster of in a matter of seconds wellness results. These outcomes displayed there are complex associations among hereditary qualities and ecological elements of parental, placental and fetal beginning. These are profoundly affected traits by maternal sustenance, genes, be concerned, the executive, environment, occasional diversity of seasons.

Effects of certain environmental factors on growth performances of Kivircik lambs

Determining the growth performance of lambs is essential for producers to supply the lamb meat with the features demanded by the market as soon as possible. Therefore, the study aimed to determine the effect of year, birth type and sex of lamb on body weight and various body measurements of Kivircik lambs. Live weights of 612 Kivircik lambs (299 males and 313 females) were used in the study, which were born in 2014, 2015 and 2016. Body measurements of 47 male lambs and 50 female lambs, randomly selected from 508 lambs born in 2014 and 2016, were used in the study.&#x0D; Birth year had significant effect on both live weights and body measurements of lambs in various growth periods. Single born and male lambs are significantly superior in both live weight and body measurements over female and twin born lambs. This situation results in being preferred for both meat production and breeding purposes more than their opponents. In order to have a more productive herd structure, female and twin lambs should be reared according to their needs for a better growth performance.&#x0D; Rump height of single born lambs and chest depth of male lambs were higher than their counterparts throughout the study. Therefore, these two body measurements can be used as reliable parameters for investigation of growth performance of Kivircik lambs.

Evaluation of the effect of birth type on blood gas and Apgar scores in newborn kids

The present study was conducted to investigate the effect of eutocia and dystocia on blood gas and Apgar scores in Aleppo goat kids. A total of 40 kids were used in the study. Kids were divided into 2 groups according to the type of birth. The first group of the study (Group 1, n=20) consisted of kids born as a result of eutocia, and the second group of the study (Group 2, n=20) was formed as a result of dystocia. Apgar scores (appearance, pulse, grimace, attitude, respiration) were evaluated at 0, 5, and 15 minutes postpartum from kids in both study groups, and blood samples were taken from blood gas injectors and blood gas profiles (pH, pCO2, pO2, HCO3) were obtained. The obtained data were analyzed with Mann-Whitney-U and Friedman post-hoc bonferroni. Spearman correlation coefficients were calculated to determine the relationships between measurements. A statistically significant difference was observed between the groups in the Apgar score at 0, 5 and 15 minutes and in the blood gas measurements of pH, pO2, pCO2, and HCO3 at 0, 5 and 15 minutes (p

Kathi fits in Tamil Paattiyal Grammar Text

Tamil Pattiyal Grammar Works are Grammatial text (Sitrilakkiyam) for literature that originated from the lives of Tamil Speaking people. Pattiyal Grammar text are thought to be an alternative to the long-time grammatical tradition. Follow such a tradition Tamil Paattiyal Grammar state the monolingual principles for the four types of births of the god, people, naragar, animal. These grammar text created a unique identity for itself. This is because of the authors of the book wrote their own ideas as grammatical principles. This is the Hypothesis of the article. This review article is based on the criteria for Descriptive performance, Sociological performance and Comparative performance.

Placental traits, and plasma concentration and placental mRNA expression of IGF-I in Bafra sheep breed with different birth type

Insulin-like growth factors (IGF) promote follicle development, ovulation, and embryonic development and affect placental and fetal growth and development in many mammalian species. Therefore, this study aimed to determine the relationship between birth type, plasma concentration, and placental mRNA expression of IGF-I in Bafra ewes. A total of 30 ewes, which have single (n=15) or twin (n=15) gestation and at least gave birth to 2, have been used as experimental animals. Before mating, blood samples were collected from the jugular vena of all ewes. Following lambing, birth type, live weight, and sex of lambs and placental traits have been recorded. Plasma IGF-I concentration was determined using a commercial ELISA kit. IGF-I gene expression level has been determined by real-time quantitative polymerase chain reaction. No difference was found between single and twin-bearing sheep in terms of placental weight and various cotyledon characteristics in the study. In contrast, total cotyledon weights were lower in singleton gestation than those in twin (P<0.05). Similarly, the total and medium cotyledon number and cotyledon efficiency of Bafra ewes with single deliveries were lower than Bafra sheep with twin births (P<0.05). Although the birth type did not affect both placental gene expression level and plasma concentration of IGF-I, sheep that gave birth to twins exhibited 0.908 times more gene expression than that to single births. The study results showed that birth type did not affect plasma IGF-I concentration and placental IGF-I gene expression level in Bafra sheep breed but changed placental characteristics.

The effect of non-genetic factors on the birth weight of Romanov sheep

The aim of this study was to analyse the non-genetic factors influencing the birth weight of Romanov lambs, and to determine which of them may be a useful source of information in the selection of female lambs for replacement. The study included 1712 lambs born in the period from 2016 to 2019. The linear model used in birth weight estimation included: birth type, sex, parity, year of birth, season of birth, and breeding group as fixed factors. Year of birth x season of birth interaction was also included in the model. All factors, except the season of birth, significantly affected birth weight (P&lt;0.05). Birth weight decreased significantly (P&lt;0.05) with increasing birth type and singles, twins, triplets and quadruplets weighing 4.11 ± 0.07, 3.56 ± 0.05, 3.07 ± 0.05 and 2.66 ± 0.08 kg, respectively. Male lambs (3.44 ± 0.05 kg) were significantly (P&lt;0.05) heavier than female lambs (3.25 ± 0.05 kg). The lightest lambs (2.99 ± 0.05 kg) were born in the first litter, after which the birth weight gradually increased up to the sixth litter (3.54 ± 0.10 kg). Litter weight showed a nonlinear increase with an increase in birth type (P&lt;0.05). The birth weight of female lambs from litters of twins and triplets with different ratios of male and female lambs did not differ significantly (P&gt;0.05). Variations in birth weight are influenced by non-genetic factors, with birth type, sex, and parity being the most important. These factors should be considered in breeding and selection programs for lamb meat production, where fertility and growth traits have the key role.