PubMed Health⌕ Search

Biomedical subjects

R Bouters

Publications and source records attributed to R Bouters.

At least 19 recordsLinked to original sources
PubMed1986

[Clinical and pathologico-anatomic findings in the bovine uterus after cesarean section and their significance for fertility].

From the observations made on a great number of obstetrical operations partly in the blue-white cattle breed either in the clinic or in practice, the indications for caesarean section and the chances for post operative conception are discussed. Despite technically perfect and careful operation, still some complications, e.g. adhesions, which reduce the subsequent fertility, can hardly be prevented. About 75% of the cows bred again become pregnant and 9.7% of those pregnancies end in abortion. However, the possibilities of delivery and the survival rate for the dam and the fetus after caesarotomy are so high, that the fertility depressing factors are readily accepted. Nevertheless, further efforts should be made to overcome them.

Animals↗
PubMed1984

Aetiology and pathogenesis of congenital torticollis and head scoliosis in the equine foetus.

In 214 cases of severe dystocia in mares, of which 141 (66 per cent) were Draught horses, deviation of the head and neck, with or without torticollis, malformed head and limbs were found to be the cause of dystocia. No evidence of a genetic lethal factor was found and torticollis was often combined with scoliosis of the head and, frequently, with malformation of one or more limbs. This is considered evidence of a common aetiology and pathogenesis of the syndrome of malformation. The malformations were found to be associated with an increased incidence of caudal and, particularly, transverse presentations. These findings are presented as evidence to support the hypothesis that, during the second half of pregnancy, the narrow tip of the uterine horns provides only limited space for the developing cranial half of the foetus. The surprisingly rapid and complete anatomical and functional recovery of severe malformations of the bones of the neck, head and limbs of surviving foals, born by caesarian section, is taken as further evidence that these malformations have no genetic basis, but originate from unfavourable intrauterine conditions.

Abnormalities, Multiple↗
PubMed1982

Birth of a monozygotic cattle twin following non surgical transfer of a single 7 day old embryo.

A female twin was born after non-surgical transfer of one 7 day old embryo to the uterus of a synchronized receptor heifer. To prove the monozygocity of the twin, the hemotype was analysed (10 blood group systems and the polymorphic blood substances). The complete hemotype was identical in both twin calves. The probability that an identical genotype in a dizygotic twin could occur only by chance was calculated to be 23.8 x 10(-8). The bisectioning of the embryo most probably occurred during hatching at about day 8.

Journal Article↗
PubMed1981

Clinical, morphological and endocrinological aspects of cryptorchidism in the horse.

The authors analysed clinical, histological and hormonal data obtained from 205 cryptorchid horses. The majority of the unilaterally and bilaterally retained testes were located in the inguinal canal; however, the ratio of inguinal vs abdominal retention appeared to decrease with advancing age. In unilateral cryptorchidism, a pronounced preference was noted for left abdominal retention, whereas for inguinal cryptorchids, the retained testes occurred equally on both sides. Right inguinal retention was found to decrease with advancing age. Histology of cryptorchid testes revealed apparently normal Leydig cells and arrested spermatogenesis. Plasma testosterone concentrations were similar in normal stallions and unilateral cryptorchids, even in those which had the scrotal testis removed. Plasma oestradiol-17beta levels were lower in unilateral cryptorchids than in stallions.

Journal Article↗
PubMed1978

Embryo transfer in cattle: an evaluation of the current situation.

A technique for the transcervical recovery of ova in cattle is described. The donors recipient pool consisted of 122 cows of different ages and 4 different breeds. Of these 102 cows were superovulated. For recovery of ova an apparatus consisting of a metal catheter glued to the inside of a 3-way Foley catheter was used. The technique used for embryo transfer was basically the same as for collecting the embryos. The 102 donors yielded at slaughter a total of 956 corpora lutea i.e. an average of 9,4 per cow. Of the ova released 294 or 30% were recovered on transcervical flushing of the uterus. 40% of the inovulated cows conceived. The future development of inovulation in cattle is discussed on the basis of the results recorded and on those previously documented.

Animals↗
PubMed1977

Post partum infection in fection in cattle: diagnosis and preventive and curative treatment.

The important economic and other implications associated with an incidence of between 3 and 30% of pueperal disease in cattle are strongly emphasized. To understand the problem the physiology of the puerperium is first reviewed. Possible pathology associated with the puerperium is discussed and the aetiological factors, symptomatology observed in the genital tract and the general symptoms are discussed. Possible ways by which puerperal disease may be prevented are briefly mentioned and possible treatments for various puerperal syndromes are subsequently suggested.

Animals↗
PubMed1976

Dropsy of the fetal sacs in mares: induced and spontaneous abortion.

Eight cases of severe dropsy of the fetal sacs have been observed in mares. All were in multiparous mares whose ages ranged from five to 20 years and who were 7 1/2 to 10 3/4 months pregnant. Abortion started spontaneously in four cases and had to be induced in the remaining four by manual dilation of the cervix, rupture of the tough allantochorion and the siphoning off of 120 to 220 litres of allantoic fluid. The amnion was normal. Dystocia, due to uterine inertia, occurred in all eight cases, one hydrocephalic fetus needing fetotomy. All fetuses were alive at delivery although four were teratologically deformed and two were markedly underdeveloped. None survived. Retention of a somewhat oedematous placenta occurred in six cases. Microscopic examination of the placenta showed some evidence of degeneration, but none of inflammatory change. One mare died, seven recovered rapidly. One mare was served again and gave birth to a living foal. Special care needs to be given to pre- and post-operative shock, retained placenta and delayed involution.

Abortion, Induced↗
PubMed1975

An intersex (male pseudohermaphrodite) horse with 64XX/XXY mosaicism.

The clinical, pathological and chromosomal findings in a male pseudohermaphrodite horse are reported. This animal appeared to be a female but showed strong male sexual behaviour. A small penis emerged from a rudimentary vagina. Two small testes were present in the abdomen and undifferentiated seminiferous tubules contained only supporting cells. No uterus was found. Culture of peripheral blood leucocytes revealed a 64XX/65XXY mosaicism.

Animals↗
PubMed1975

Some aspects of endometrial cup formation and PMSG production.

Two females of heterosexual pairs of chimaeric horse twins were fertilized by their co-twin brother and PMSG production examined during gestation. Four pregnancies developed in one mare and two in the other. The levels of PMSG were high in both mares and remained detectable in the peripheral blood until 220 and 265 days of gestation. The fetal membranes of one mare contained remnants of cup secretion with PMSG activity at term. The findings support the thesis of Allen & Moor (1972) that the endometrial cups are of fetal origin and that they are destroyed by immunological mechanisms.

Abortion, Veterinary↗