The Incidence of Dystocia in Fine‐wool Merino Ewes

George, JM

doi:10.1111/j.1751-0813.1975.tb06931.x

Cited by 16 publications

(15 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Jn this study the incidence of dystocia in Dorset Horns was extremely high when compared with fine-wool Merinos (George 1975) lambing at the same time under similar conditions. However, the incidence is generally comparable with that reported for other meat type breeds such as Southdowns (Laing 1949), Romney Marsh (Quinlivan et al 1966).…”

Section: Discussionmentioning

confidence: 55%

“…There does not appear to be any general policy to cull ewes with a history of dystocia from the breeding flocks. This paper reports the incidence and some of the factors associated with dystocia in a Dorset Horn flock which lambed in winter, spring or summer in 10 successive years at Armidale, New South Wales, and is complementary to a similar report for a fine-wool Merino flock (George 1975).…”

Section: Iandoductionmentioning

confidence: 85%

“…Also there was no relationship between the incidence of dystocia and pre-lambing bodyweight (Table 6). In fine-wool Merinos (George 1975) ewes at lower stocking rates had the lowest incidence of dystocia and these apparently conflicting results suggest that there is an interaction between ewe condition and foetal size. The finding that significantly more 2-year-old ewes were prone to lambing difficulty than ewes of any other age group is different from the results previously reported (George 1975) for Merinos.…”

Section: Discussionmentioning

confidence: 98%

See 2 more Smart Citations

The Incidence of Dystocia in Dorset Horn Ewes

George

1976

Aust Veterinary J

Self Cite

View full text Add to dashboard Cite

The incidence of dystocia was recorded in flocks of Dorset Horn ewes lambing in winter, spring or summer and grazed at 8, 12 or 16 ewes per hectare over a ten-year period. The mean incidence of dystocia was 34% of ewes lambing. Significantly more ewes experience a difficult birth at winter (35%) and spring (39%) than summer (26%) lambings. Neither stocking rates nor pre-lambing ewe bodyweight were related to the incidence of dystocia. The incidence of dystocia was significantly greater in 2-year-old ewes than in any other age group. Foetal size was of major importance in the occurrence of dystocia. Approximately 60% of single and twin born lambs that had birth weights greater than 4.5 kg had a difficult birth whereas in lambs weighing less than 3.2 kg only about 10% were affected. Thirty-six per cent of all perinatal mortality was attributable to dystocia. Approximately 27% of single and 73% of twin presentations in assisted births were abnormal, 31% of all lambs assisted had 1 or both legs retained, 4% had posterior (including breech) presentations and the remaining 8% were of varied forms of malpresentation. Significantly more single male than female lambs experienced a difficult birth and the mean birth weights of single, twin and triplet born lambs that had a difficult birth were greater than the birth weights of singles, twins and triplets born normally.

show abstract

Section: Discussionmentioning

confidence: 55%

Section: Iandoductionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 98%

See 1 more Smart Citation

The Incidence of Dystocia in Dorset Horn Ewes

George

1976

Aust Veterinary J

Self Cite

View full text Add to dashboard Cite

show abstract

“…Comparison of the results of the various studies is nevertheless difficult since the outcome of the studies is biased by differences in techniques used and lack of uniformity of definitions and criteria used for assistance, i.e. interference at lambing (Grommers, 1967;Naaktgeboren et al, 1971;Krueger and Wassmuth, 1974;George, 1975George, , 1976Bosc and Cornu, 1976;Woolliams et al, 1983a).…”

Section: Introductionmentioning

confidence: 99%

Parturition difficulties in sheep

Grommers

Elving

Eldik

1985

Animal Reproduction Science

View full text Add to dashboard Cite

Anim. Reprod. Sci., 9: 365--374.The incidence of difficult parturition was recorded in Texel Sheep lambs (224), Milk Sheep lambs (273) and various crossbreeds (1043) in ten spring lambing seasons. At lambing time the ewes were under 24-hour observation.Difficult parturition is defined as necessity for obstetrical assistance as a result of failure of expulsion or progress within a given time limit.The course of parturition was recorded on a standard protocol. Shortly after parturition ewes and lambs were weighed and several body measurements of the lambs were taken.In this first report of the study, special attention is given to the influence of presentation of the lambs at birth. Presentation type is divided into four categories:--

show abstract

“…In this study, there were several herds of the Merino and Solčavsko‐Jezerska breeds, which are robust sheep with lower fecundity, so their lambs are mostly single and heavier than lambs of the Romanov breed. The mean incidence of DT in Merino ewes was 4.1% of ewes lambing (George ). In this study, the incidence of DT in ewes was 7.51% for all breeds in the study.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Intrauterine Antibiotics versus Ozone Medical Use in Sheep with Retained Placenta and Following Obstetric Assistance

Đuričić

Valpotić

Žaja

et al. 2016

Reprod Domestic Animals

View full text Add to dashboard Cite

This study outlines a new approach to reproductive tract treatment using ozone foam spray for certain ovine obstetrical problems, such as retained foetal membranes and possible uterine infections following obstetric assistance (OA), in comparison with classical antibiotics treatments. The study was conducted on 256 ewes from 11 sheep farms in north-western Croatia. A total of 139 ewes were diagnosed with dystocia (DT) and 49 with retention of placenta (RP). Ewes with RP were treated either with ozone foam spray (Riger spray G; Novagen(®) ) applied into the body of the uterus for 2-3 s (first or RPO group; n = 24) or with two foaming, intrauterine tablets of oxytetracycline hydrochloride (Geomycin(®) F) (second or RPA group; n = 25). The third and fourth groups consisted of ewes that received OA for dystocia (including ringwomb, foetal oversize and assistance of abnormal position and posture). The third group (DTO; n = 70) was treated with ozone foam spray, while ewes in fourth group (DTA; n = 69) were treated with antibiotics. The ewes in the control group (CTL) with physiological puerperium were randomly selected (n = 70) from all herds. Transrectal ultrasonography (transversal diameter of uterine horns) was used for the control of uterus regression on days 2 and 25 after parturition. There was a difference in transversal uterine horn diameter in the RP groups, that is RPO and RPA (5.40 ± 0.53 cm vs. 5.43 ± 0.40 cm), ewes with dystocia, that is DTO and DTA (5.37 ± 0.49 cm vs. 5.54 ± 0.60 cm) and ewes from the CTL group (4.98 ± 0.35 cm) one day after parturition. Average transversal uterine diameter of all groups at day 25 post-partum was 1.80 ± 0.15 cm. The intrauterine ozone treatment in ewes with RP and after manual obstetrics attained similar results to spontaneously delivered ewes (CTL group), showed as the physiological regression of the uterus with a similar transversal diameter without the presence of lochia in the uterine lumen, indicating that this could be a novel potential alternative therapy.

show abstract

The Incidence of Dystocia in Fine‐wool Merino Ewes

Cited by 16 publications

References 9 publications

The Incidence of Dystocia in Dorset Horn Ewes

The Incidence of Dystocia in Dorset Horn Ewes

Parturition difficulties in sheep

Comparison of Intrauterine Antibiotics versus Ozone Medical Use in Sheep with Retained Placenta and Following Obstetric Assistance

Contact Info

Product

Resources

About