scholarly journals Maternal and foetal effects of methoxyflurane anaesthesia in the pregnant ewe

1975 ◽  
Vol 22 (4) ◽  
pp. 449-459 ◽  
Author(s):  
J. Bruce Smith ◽  
F. A. Manning ◽  
R. J. Palahniuk
Keyword(s):  
Methoxyflurane Anaesthesia ◽  
Pregnant Ewe

Effects of cobalt deficiency in the pregnant ewe on neonatal lamb survival

1992 ◽  
Vol 15 ◽  
pp. 169-171 ◽  
Author(s):  
G. E. J. Fisher ◽  
A. MacPherson
Keyword(s):  
Reproductive Performance ◽  
Dry Matter ◽  
Methylmalonic Acid ◽  
Milk Powder ◽  
Vitamin B ◽  
Deficient Diet ◽  
Cobalt Deficiency ◽  
Acid Status ◽  
Pregnant Ewe ◽  
Skimmed Milk Powder

It has been suggested (Mills, 1981) that there was a lack of research on the effects of cobalt (Co) deficiency on the reproductive performance of sheep. Duncan, Morrison and Garton (1981) reported that clinically Co-deficient ewes produced fewer lambs with a higher incidence of stillbirths and neonatal mortalities than Co-sufficient animals. Garton, Duncan and Fell (1981) related these findings to the vitamin B12 and methylmalonic acid status of dams. However, their investigations used few animals and were therefore inconclusive. The objectives of this work were to investigate the effects of subclinical Co deficiency in pregnant hill sheep on reproductive performance and neonatal lamb viability.Experiment 1 (1985/86) comprised 60 Scottish Blackface × Swaledale ewes, while experiment 2 (1986/87) included 30 of these animals plus 30 pure Scottish Blackface sheep. In both experiments the ewes were housed and bedded on sawdust and a Co-deficient diet of timothy hay, micronized maize, maize gluten, dibasic calcium phosphate and sodium chloride was offered. Skimmed milk powder was introduced to the diet during lactation. The Co content of the diet was 0.06 mg Co per kg dry matter.

EFFECT OF LOW ZINC INTAKE DURING PREGNANCY ON PLASMA PROLACTIN, PROGESTERONE, PROSTAGLANDIN, CORTISOL AND PROTEIN CONCENTRATIONS OF EWES DURING THE PERIPARTURIENT PERIOD

1986 ◽  
Vol 66 (3) ◽  
pp. 643-651 ◽  
Author(s):  
J. A. FITZGERALD ◽  
G. A. EVERETT ◽  
J. APGAR
Keyword(s):  
Plasma Concentrations ◽  
Normal Pregnancy ◽  
Late Gestation ◽  
Plasma Prolactin ◽  
Plasma Parameters ◽  
Zinc Intake ◽  
Periparturient Period ◽  
Prostaglandin F ◽  
The Mean ◽  
Pregnant Ewe

The effect of low dietary Zn intake upon several plasma endocrine and metabolic profiles was examined during late gestation in the ewe. Thirty adult, primiparous Finncross ewes were fed a low Zn diet with (+Zn, n = 14) or without (0Zn, n = 16) supplemental Zn in the drinking water starting day 1 of pregnancy. Although the mean prepartum progesterone and prolactin concentrations were lower (P < 0.05 and P < 0.01, respectively) in 0Zn than in +Zn ewes, the peak prolactin concentrations in 0Zn ewes at lambing were similar to +Zn ewes. Both basal and thyrotropin-releasing-hormone (TRH)-induced prolactin release were less (P < 0.01) in 0Zn ewes 2 d postpartum. Plasma concentrations of 13, 14-dihydro-15-keto prostaglandin F2α (PGFM) of ewes sampled within 45 min post-lambing were lower (P < 0.05) in 0Zn ewes. There was no difference in cortisol concentrations within 45 min after lambing between 0Zn and + Zn ewes. Plasma protein concentrations in 0Zn ewes were higher (P < 0.01) than those in +Zn ewes during pregnancy. In summary, these data show that low Zn intake in the pregnant ewe affected several endocrine and metabolic plasma parameters associated with normal pregnancy and parturition. Key words: Zinc, parturition, dystocia, feed intake, ovine

Effects of selenium supply and dietary restriction on maternal and fetal metabolic hormones in pregnant ewe lambs1

2008 ◽  
Vol 86 (5) ◽  
pp. 1254-1262 ◽  
Author(s):  
M. A. Ward ◽  
T. L. Neville ◽  
J. J. Reed ◽  
J. B. Taylor ◽  
D. M. Hallford ◽  
...  
Keyword(s):  
Dietary Restriction ◽  
Metabolic Hormones ◽  
Pregnant Ewe

The physical relationships of the abdominal organs in the pregnant ewe

1968 ◽  
Vol 70 (2) ◽  
pp. 171-177 ◽  
Author(s):  
J. M. Forbes
Keyword(s):  
Cross Sections ◽  
Abdominal Fat ◽  
Competition For Space ◽  
Abdominal Organs ◽  
Abdominal Content ◽  
Intestinal Contents ◽  
Medium Quality ◽  
Pregnant Ewe ◽  
In Pregnancy

SUMMARYFive non-pregnant ewes and seventeen ewes at various stages of pregnancy were fed on a medium quality hay for several weeks before being slaughtered and frozen. Each ewe was sawn into 5 cm cross-sections.The sections were photographed. The uterus was extracted from the sections and its volume measured. Volumes of reticulo-rumen contents, intestinal contents and abdominal fat were estimated from the photographs.Models of the uterus and rumen were constructed and examples of these and of the photographs are shown.The volume of the uterus increased steadily as pregnancy progressed, but rumen volume was not reciprocally depressed until the last 5 weeks of pregnancy. Volume of digesta was inversely related to volume of incompressible abdominal content (uterus and fat). Abdominal fat was a particularly important factor in the depression of rumen capacity in pregnancy when there was great competition for space in the abdomen.

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