scholarly journals Retrospective study of the reproductive performance of Barb and Thoroughbred stallions in Algeria

2019 ◽  
Vol 12 (7) ◽  
pp. 1132-1139
Author(s):  
Nedjma Aouane ◽  
Abdelkrim Nasri ◽  
Mohamed Al Amine Bekara ◽  
Ahmed Khireddine Metref ◽  
Rachid Kaidi
Keyword(s):  
Mortality Rate ◽  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Odds Ratio ◽  
Influencing Factor ◽  
Reproductive Potential ◽  
Embryonic Mortality ◽  
Reproductive Parameters ◽  
Thoroughbred Horses ◽  
Number Of Cycles

Background and Aim: The Barb horse occupies a prominent place in the history, culture, and equestrian traditions of the Maghreb (Algeria, Morocco, and Tunisia). Although many studies on the breed standard and morphometry have been published, there are no studies on its fertility and reproductive potential. Thus, this work aimed to study the fertility of Barb, Arabian Purebred, and Thoroughbred horses in Algeria. Materials and Methods: A total of 168 stallions and 1202 mares at the Chaouchaoua Stud farm in Tiaret, Algeria, were included in the study. The reproductive performance during 1592 cycles over 10 consecutive mating seasons (2003-2012) was evaluated. Multivariate analysis with logistic regression was used to analyze the reproductive parameters such as the number of cycles operated, number of pregnant mares, pregnancy rate per cycle, seasonal pregnancy rate, and embryonic mortality rate, and to determine the influence of breed, stallion's age, and year of the study on reproduction. Results: Statistical analysis showed that stallion breed was a significant influencing factor for the number of pregnant barren mares (Odds ratio [OR]=1.72; p=0.03; 95% confidence interval [CI]=1.05, 2.84) seasonal pregnancy rate (OR=1.40; p<0.001; 95% CI=1.29, 1.53). Additionally, the reproductive performance of the Barb stallion was superior to that of the Thoroughbred stallion. With regard to the significant influence of stallion's age of >5 years on the number of pregnant foaling mares and seasonal pregnancy rate, significant interactions were observed between the stallion's breed and age, and the pregnancy rate per cycle: in the Barb breed, the pregnancy rate per cycle increased with the age of the stallion, while in the Thoroughbred, it decreased with age. Moreover, a significant effect of the year of the study on the pregnancy rate per cycle and number of pregnant foaling mares was observed. In contrast, the number of cycles and embryonic mortality rate were not influenced by the breed and age of the stallion, or the year of the study. Conclusion: The Algerian Barb horse attained a similar level of fertility compared with that of the Arabian Purebred and Thoroughbred stallions depending on its age and reproductive performance.

Effects of melatonin implantation on the fertility potentials of Kivircik and Charollais ewes and rams during the non-breeding season

2017 ◽  
Vol 20 (3) ◽  
pp. 501-506 ◽  
Author(s):  
M. Cevik ◽  
C. Yilmazer ◽  
A. Kocyigit
Keyword(s):  
Pregnancy Rate ◽  
Breeding Season ◽  
Reproductive Performance ◽  
Reproductive Potential ◽  
Testicular Volume ◽  
Melatonin Treatment ◽  
Scrotal Circumference ◽  
Estrus Response

AbstractThis study examined the effect of melatonin implantation during the non-breeding season on the reproductive performance of ewes and the testicular dimensions of rams. In seasonally anestrus Kivircik and Charollais ewes and rams were subjected to melatonin. Estrus response was significantly higher in treated than control ewes of both breeds (p<0.001). The pregnancy rate was significantly lower (p<0.001) in the control than in the treated animals. The twinning rate was significantly lower in melatonin implanted Kivircik than Charollais ewes (p<0.05). The testicular dimensions after 42 days of melatonin treatment increased in both breeds. Scrotal length (SL) increased in Kivircik and Charollais rams (p<0.01). The increase in scrotal circumference (SC) was more marked in the Charollais (P<0.01) than in the Kivircik rams. There was a large increase in testicular volume (TV) in both Kivircik (p<0.01) and Charollais (p<0.001) rams. This study shows that melatonin implants can be applied to induce estrus in ewes approximately four months earlier than breeding season. Melatonin implantation in the non-breeding season significantly increased testicular dimensions in Kivircik and Charollais rams thus increasing their reproductive potential.

scholarly journals Reproductive Parameters of Native Sows in Selected Area of Bangladesh

2014 ◽  
Vol 12 (2) ◽  
pp. 211-215
Author(s):  
MA Motaleb ◽  
MK Chowdhury ◽  
MA Islam ◽  
JU Ahmed ◽  
MMU Bhuiyan
Keyword(s):  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Cycle Length ◽  
Oestrous Cycle ◽  
Gestation Length ◽  
Reproductive Parameters ◽  
Factors Affecting ◽  
Interview Method ◽  
Pig Farms ◽  
Age At Puberty

Reproductive performance is considered as one of the important factors affecting the productivity and economy of the pig farms. The objective of the study was to determine the reproductive parameters of gilts and sows by direct interview method using a pretested questionnaire in selected area of Bangladesh. A total of 20 pig farms having 60 gilts and 27 sows were included in this investigation. The present study revealed that, in native female pigs, the age at puberty was 229.0 ± 16.7 days, the oestrous cycle length was 22.2 ± 1.2 days, the oestrous duration was 37.9 ± 14.2 hours, the gestation length was 113.5 ± 1.0 days, the interval between farrowing and onset of oestrus was 62.9 ± 11.9 days and the number of piglets born per native sow was 5.25 ± 2.3. It was also found that the first service pregnancy rate was 71.7% and the number of services required for each pregnancy was 1.3. The highest proportion of pigs was detected in oestrus by observing stand to be mounted by boars. It is concluded that reproductive parameters of native sows need to be improved for better production.DOI: http://dx.doi.org/10.3329/bjvm.v12i2.21294 Bangl. J. Vet. Med. (2014). 12 (2): 211-215  

scholarly journals Developmental and reproductive characteristics of beef heifers classified by number of estrous cycles experienced by start of first breeding

2018 ◽  
Vol 3 (1) ◽  
pp. 541-548 ◽  
Author(s):  
Andrew J Roberts ◽  
Jaclyn N Ketchum ◽  
Richard N Funston
Keyword(s):  
Pregnancy Rate ◽  
Estrous Cycle ◽  
Reproductive Performance ◽  
Beef Heifers ◽  
Estrous Cycles ◽  
Physical Maturation ◽  
Fat Thickness ◽  
Ad Libitum ◽  
Number Of Cycles ◽  
Cycle Group

Abstract A retrospective analysis was conducted to evaluate the effect of number of estrous cycles exhibited before breeding on growth and reproductive performance of replacement beef heifers fed ad-libitum or restricted by 20% less than ad-libitum during postweaning development over a 9-yr period. Progesterone concentration in blood samples collected at 9- to 11-d intervals were used to assign heifers into groups by number of estrous cycles exhibited before the start of breeding: 0 (nonpubertal; n = 395), 1 (n = 205), 2 (n = 211), 3 (n = 116), or &gt;3 (n = 249). Heifers (P &lt; 0.01) in the 0 cycle group were born 6 d later than the 1, 2, or 3 cycle groups, which were born 4 d later (P &lt; 0.01) than the &gt;3 cycle group. Weight of heifers at birth decreased (P &lt; 0.05) as the number of cycles increased. Weaning weight and ultrasound measures of loin area and fat thickness over the loin at 1 yr age increased as the number of cycles increased (P &lt; 0.01). Postwean weight gain, hip height at 1 yr age, and weights from the start of breeding through precalving increased with cycle numbers in a quadratic fashion (P &lt; 0.02) and were greater (P &lt; 0.05) in ad-libitum than restricted-fed heifers. Pregnancy rate in the 0 cycle group was lower (84%; P &lt; 0.05) than the 1 (90%) or &gt;3 (94%) estrous cycles groups and tended to differ (P &lt; 0.1) from the 2 (88%) and 3 (89%) estrous cycle groups. Interval from the start of breeding to calving was 3 to 5 d longer (P &lt; 0.05) for the 0 cycle group (300 ± 1 d) than other groups. Proportion of heifers calving in the first 21 d was less (P &lt; 0.05) in the 0 or 1 cycle groups than other groups. Pregnancy rates of 2-yr-old cows (n = 898) were lowest (P &lt; 0.05) for the 0 (73%) and 2 (79%) estrous cycle groups than the 1 (85%), 3 (90%), or &gt;3 (92%) estrous cycle groups. Restricted level of feeding during postweaning development resulted in greater (P &lt; 0.05) proportion of heifers in 0 cycle group and lower (P &lt; 0.05) proportion in &gt;3 cycle group, but reproductive performance was not influenced (P &gt; 0.1) by level of feeding or interaction of feeding and estrous cycle grouping. In summary, date of birth and rate of physical maturation (weight, height, and fat deposition) were associated with timing of puberty. Pregnancy rate was greater in heifers that exhibited estrus before the start of breeding, but did not improve from having more than one estrous cycle. Proportion conceiving early was greater for heifers having two or more cycles before breeding.

Reproductive performance of cows with subclinical endometritis diagnosed by different cytological thresholds in the postpartum period

2013 ◽  
Vol 41 (01) ◽  
pp. 15-19 ◽  
Author(s):  
S. Zduńczyk ◽  
T. Janowski ◽  
W. Barański
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Polymorphonuclear Leucocytes ◽  
Reproductive Parameters ◽  
Cytological Examination ◽  
And Control ◽  
Subclinical Endometritis ◽  
The Impact ◽  
Positive Groups

Summary Objective: To determine the impact of cytologically determined endometritis (CE) diagnosed according to three different cytological thresholds in the 4th and 6th week postpartum (p. p.) on the subsequent reproductive performance in dairy cows. Material and methods: Dairy cows (n = 222) were clinically examined in the 4th week (Exam I) and in the 6th week (Exam II) p. p. and endometrium samples were collected for cytological examination using the cytobrush method. Three cytological thresholds (percent of polymorphonuclear leucocytes to epithelial cells) were used for categorization of cows: 1) > 18% at Exam I and > 10% at Exam II; 2) > 8% at Exams I and II; 3) > 5% at Exams I and II. The animals were categorized as endometritis positive (CE+) or negative (CE-) according to all cytological thresholds at Exams I and II. For all six experimental groups the following reproductive parameters were calculated: first insemination pregnancy rate, number of services per conception, intercalving period, and total pregnancy rate on day 300 p. p. Results: According to different thresholds prevalence of CE ranged from 48.0% to 65.9% at Exam I and from 26.0% to 34.7% at Exam II. The first insemination pregnancy rate was statistically lower in all CE positive groups at Exam I. Number of inseminations per conception was higher (p < 0.05) in each CE positive cows with exception of group CE+ at Exam II. Intercalving periods were longer in CE cows, and significant (p < 0.05) difference was found for groups ICE+ and ICE- at Exam I. Overall pregnancy rates were similar in cytologically determined endometritis and control cows. Conclusion and clinical relevance: Impaired fertility at herd level may concern only particular reproductive indices. It seems that each herd with subclinical endometritis needs to be evaluated and managed individually, according to the different housing, feeding, and environmental conditions. The first of three thresholds used to cytologically diagnose endometritis seems to be the most reliable when applied in the 4th week p. p.

scholarly journals Factors That Influence on Reproductive Efficiency in Karadi And Awassi Sheep Raised under Traditional Conditions

2020 ◽  
Vol 23 (2) ◽  
pp. 169-181
Author(s):  
Hawar M. H. Zebari
Keyword(s):  
Mortality Rate ◽  
Reproductive Performance ◽  
Intramuscular Injection ◽  
Conception Rate ◽  
Reproductive Efficiency ◽  
Reproductive Parameters ◽  
Awassi Sheep ◽  
Sheep Production ◽  
To Come

Poor reproductive efficiency is considered one of the main causes of declining sheep production in sheep raised under traditional farm conditions. Many factors contribute to declining reproductive performance in ewes. The objective of the present study was to investigate factors that affect reproductive efficiency in Karadi and Awassi sheep raised under farm conditions. Four hundred Karadi and Awassi sheep (200 Karadi and 200 Awassi) were used in this study. Of each breed 100 ewes were allowed to come into oestrus spontaneously and another 100 ewes were synchronized using intravaginal sponges. Ewes were injected with intramuscular injection of 500 IU of PMSG when sponges were removed at 14 days. This study revealed that the breed had a significant effect on twinning rate and lamb mortality rate in spontaneous ewes. Breed also had a significant effect on the rate of lambing, lamb mortality, abortion, and dystocia in synchronized ewes. In addition, parity had a significant effect on the rate of lambing, lamb mortality and dystocia in spontaneous Karadi and Awassi ewes. Furthermore, parity also had significant effect on the rate of lambing, lamb mortality, dystocia and barrenness in synchronized Karadi and Awassi ewes. Different ram to ewe ratio during the oestrus period had a significant effect on conception rate and barrenness rate in synchronized Karadi and Awassi ewes. In conclusion, breed had effect on some reproductive parameters in synchronized and spontaneous ewes. Parity 2 had higher reproductive performance than parity 1 and parity ≥3 ewes. Conception rate were higher in 1:8 ram to ewe ratio group, while 1:≥16 ram to ewe ratio group had higher barrenness rate.

scholarly journals Retained bovine placenta - various treatments and their effects

2021 ◽  
pp. 3-3
Author(s):  
Milan Maletic ◽  
Filip Spasojevic ◽  
Jovan Blagojevic ◽  
Nevenka Aleksic ◽  
Slobodanka Vakanjac ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Current Work ◽  
Reproductive Parameters ◽  
Retained Placenta ◽  
Bovine Placenta

Given the influence of retentio secundinarum (RS) on the reproductive performance of cows, the current work aimed to assess the effect of various approaches to the treatment of retained placenta on the main reproductive parameters, primarily on the interval from parturition to the first service, and the insemination index. The trial involved 120 dairy cows in which the placenta was not expelled within 24 h postpartum. The first group (G1, n=60) contained cows in which the retained placenta was not extirpated, but they were administered antibiotics. The second group (G2, n=60) comprised cows in which the placenta was removed manually, and were also administered antibiotics. At the end of the study, 53 cows remained in G1 and 54 cows in G2. According to medicament therapy, both groups were divided into three sub-groups treated with: procaine benzylpenicillin, chlortetracycline hydrochloride or ceftiofur. Comparison of the performance of G1 and G2 cows showed significantly better fertility parameters occurred in the animals from which the retained placenta was extracted manually. The pregnancy rate in the G2 group was remarkably higher than in the G1 group. The average service interval was significantly lower (p<0.05) in the G2 group compared to the G1 group. The best results were obtained with the i.m. administration of ceftiofur after the removal of the placenta.

Hypercoagulability in Septic Shock Patients With Thrombocytopenia

2021 ◽  
pp. 088506662110241
Author(s):  
Sang-Min Kim ◽  
Sang-Il Kim ◽  
Gina Yu ◽  
June-Sung Kim ◽  
Seok In Hong ◽  
...  
Keyword(s):  
Emergency Department ◽  
Septic Shock ◽  
Multivariate Analysis ◽  
Platelet Count ◽  
Mortality Rate ◽  
Confidence Interval ◽  
Sofa Score ◽  
Odds Ratio ◽  
Fibrinogen Level ◽  
Limited Information

Background: Despite thrombocytopenia, patients with sepsis often experience hypercoagulability. However, limited information is available on the prevalence and effect of hypercoagulability in patients with sepsis-induced thrombocytopenia. Hence, we evaluated the prevalence of hypercoagulability and the association between hypercoagulability and clinical outcomes in septic shock patients with thrombocytopenia. Methods: Thromboelastography (TEG) was performed prospectively in 1294 patients with septic shock at the emergency department (ED) between January 2016 and December 2019. After excluding 405 patients who did not require resuscitation, refused enrollment, or developed septic shock after ED presentation, 889 patients were included. We defined thrombocytopenia as an admission platelet count lower than 150,000/µl according to SOFA score. We defined hypocoagulability and hypercoagulability as coagulation index (CI)< −3 and >3 on TEG, respectively. Results: Of the 889 septic shock patients (mean age 65.6 ± 12.7 years, 58.6% male), 473 (53.2%) had thrombocytopenia. Eighty-five (18.0%) patients showed hypercoagulable TEG and73 (15.4%) patients showed hypocoagulable TEG. The hypercoagulable TEG group had a significantly higher fibrinogen level and a lower 28-day mortality rate than the normal and hypocoagulable TEG groups (518 vs. 347 and 315 mg/dL; 7.1% vs. 21.1% and 36.8%, P < 0.01, respectively). In multivariate analysis, hypercoagulable TEG was associated with a decreased mortality rate (odds ratio: 0.395; 95% confidence interval, 0.162-0.965). Conclusions: In septic shock patients with thrombocytopenia, hypercoagulability was not uncommon. TEG can quickly distinguish the hypercoagulability and hypocoagulability states and serve as a valuable tool for evaluating the degree and risk in septic shock patients with thrombocytopenia.

THE ACCUMULATIVE EFFECT OF FINNSHEEP BREEDING IN CROSSBREEDING SCHEMES: REPRODUCTIVE PERFORMANCE

1988 ◽  
Vol 68 (1) ◽  
pp. 69-81 ◽  
Author(s):  
MOHAMED H. FAHMY ◽  
JACQUES J. DUFOUR
Keyword(s):  
Body Weight ◽  
Mortality Rate ◽  
Key Words ◽  
Litter Size ◽  
Reproductive Performance ◽  
Conception Rate ◽  
Ovulation Rate ◽  
Genetic Groups ◽  
Linear Regressions ◽  
Size At Birth

Reproductive performance and body weight were studied on 361 ewes, representing Finnsheep (F), DLS (a population of 1/2 Dorset, 1/4 Leicester, 1/4 Suffolk) and seven combinations ranging from 1/8 to 7/8 Finnsheep breeding. Conception rate in yearlings was 61.5% for DLS compared to 89.0% for F with the crosses being intermediate. Conception rate in older ewes was similar in the different genetic groups (avg. 94%). Ovulation rate and litter size at birth of DLS ewes were 1.72 and 1.44 lambs, which was less than half those of F ewes (3.51 and 2.86 lambs, respectively). Both traits increased progressively with an increase in F breeding in crosses and with advances in age. DLS ewes weaned 1.22 lambs compared to 2.03 lambs for F ewes and 1.84 lambs for 4/8 F ewes. The heaviest litters at weaning (31.7 kg) were raised by 4/8 F ewes, followed by 7/8 F (30.8 kg) while those raised by DLS ewes weighed 23.0 kg and F ewes 29.1 kg. Percentage of ova lost per ewe mated averaged 24% and ranged between 18% (DLS and 1/8 F) and 29% (6/8 F). About 3.6% of lambs were born dead and a further 13.8% died before weaning. Preweaning mortality rate was highest in F (22.9%) and lowest in 3/8 F (9.4%). Average kilograms of lambs weaned per ewe exposed was highest in 4/8 F (27.6 kg) followed by F (26.0 kg), whereas that of DLS was the lowest at 18.1 kg. The 4/8 F cross showed 25% heterosis in kg of lambs weaned per ewe exposed and 52.5% increase over DLS. Significant positive linear regressions were calculated for ovulation rate, litter size and preweaning mortality rate on proportion of Finnsheep breeding in crosses. The relation was quadratic for percent ova lost and lamb mortality at weaning. Yearling DLS females weighted 36 kg compared to 44 kg for F yearlings. However, at 5 yr of age DLS ewes weighed 62 kg, 5 kg heavier than F ewes. The heaviest ewes at all ages were the 4/8 F (45 kg at 1 yr, 65 kg at 5 yr). Key words: Reproduction, DLS sheep, Finnsheep, crossbreeding, heterosis, repeatabilities

Reproductive performance of thoroughbred horses in Spain

1994 ◽  
Vol 14 (2) ◽  
pp. 89-92 ◽  
Author(s):  
M.L. Hevia ◽  
A.J. Quiles ◽  
F. Fuentes ◽  
C. Gonzalo
Keyword(s):  
Reproductive Performance ◽  
Thoroughbred Horses

scholarly journals Comparison of the effects of Presynch-Ovsynch, Presynch- Ovsynch+CIDR, and G6G protocols on the reproductive performance of lactating Holstein cows in the postpartum period

2021 ◽  
Vol 53 (4) ◽  
Author(s):  
Hesam Kohsari ◽  
Khatereh Berenjian
Keyword(s):  
Serum Concentration ◽  
Pregnancy Rate ◽  
Reproductive Performance ◽  
Body Condition Score ◽  
Dairy Farm ◽  
Fixed Time ◽  
Pregnancy Rates ◽  
Holstein Cows ◽  
Treatment Protocols ◽  
Ovulatory Follicle

This study was performed on an industrial dairy farm near Tehran province, Iran, on 666 lactating Holstein cows from September 2019 to June 2020 in order to eliminate the harmful effects of heat stress on the reproductive performance of the cows. The hypothesis of the recent study was that by increasing the serum concentration of progesterone (P4) in the luteal phase before insemination in the form of Presynch-Ovsynch+CIDR (POC) and G6G protocols, the pregnancy rate of cows would be increased compared to the Presynch-Ovsynch (PO) protocol. The aim of the present study was to evaluate the effects of Presynch-Ovsynch (PGF2α-14d- PGF2α-12d-Ovsynch (OVS: GnRH(GnRH1)- 7d-PGF2α(PG)-2d-GnRH)-18h-Fixed-time artificial insemination (FTAI), n=212), Presynch-Ovsynch+CIDR (similar to the PO protocol, plus the use of a CIDR for 7 days, from the start of the OVS+FTAI protocol to the time of PG injection, n=230), and G6G (PGF2α- 2d-GnRH-6d-OVS+FTAI, n=224) protocols on the reproductive performance and pregnancy rate of lactating Holstein cows. The average body condition score (BCS) for the cows was about 2.5 at the time of the onset of the OVS+FTAI program. The average daily milk production for cows at the time of the start of the OVS+FTAI program was 38.3 kg/day. On average, the studied cows were inseminated 86 days postpartum. Implementation of the G6G protocol in comparison to the PO and POC protocols increased the serum concentration of P4 at GnRH1 (P=0.04). The cows that received the G6G protocol had a greater number of corpuses luteum (CL) on their ovaries at PG in comparison to the cows in the PO and POC protocols (P=0.03 and P=0.05, respectively). For all treatment protocols, the pregnancy rate of cows with &gt;2 CLs on their ovaries at PG was significantly higher than for cows with ≤2 CLs on their ovaries at this time. The overall pregnancy rate for all cows studied was 42%. Separately, pregnancy rates for cows in PO, POC, and G6G protocols were calculated at 36.7%, 41.7%, and 47.3% respectively. The highest and the lowest pregnancy rates were obtained in the G6G and PO protocols, respectively (P=0.03). It can be concluded that the G6G protocol increased the pregnancy rate of cows in comparison to the PO but not to the POC protocol. This result can be attributed to the increase in serum concentration of P4 at GnRH1 and the greater number of CLs at PG following implementation of the G6G compared to the PO protocol. Although CIDR administration in the POC protocol led to an increase in the pregnancy rate of cows compared to the PO protocol, possibly by increasing the synchrony rate and the quality of the ovulatory follicle, this increase was not statistically significant (P=0.09).

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