Equine reproductive physiology, breeding and stud management最新文献

Embryo transfer. 胚胎移植。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0376

引用次数: 0

Management of the mare at parturition. 母马分娩时的管理。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781845934507.0169

M. Morel

引用次数: 1

Infertility in the mare. 母马不孕。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0235

S. Reid, John, F., Weatherston

{"title":"Infertility in the mare.","authors":"S. Reid, John, F., Weatherston","doi":"10.1079/9781789242232.0235","DOIUrl":"https://doi.org/10.1079/9781789242232.0235","url":null,"abstract":"A nomalous sex chromosome comAposition is a cause of infertility in mares (1, 2, 3, 4, 5, 6, 7). Mosaicism is the occurrence of two or more genetically different cell types within the body of an individual (5). The impact of sex chromosome mosaicism on the fertility of an animal depends on the relative proportions of the two cell lines in the ovary. The mare may exhibit a Turner-like syndrome, which is an infertile condition characterized by streaked gonads, short stature, and cells containing only one X chromosome, or they may be only subfertile (1, 3, 5). The most severely affected mares have small, firm ovaries with undifferentiated ovarian stroma (3, 5). In such mares on rectal palpation, the uterus and cervix are generally small and flaccid. The external genitalia are female but the vulva is smaller than normal; there is no clitoral enlargement. Some affected mares have been reported to be smaller in height and weight than normal mares of their corresponding breeds. The response of affected mares to teasing by a stallion ranges from total rejection to allowing the stallion to mount and mate (4). Generally there is no cyclical pattern to the estrous behavior (4, 5). Affected mares are unresponsive to hormonal stimulation (6). During the 1986 breeding season, a four-year-old Standardbred maiden mare was presented with a history of persistent anestrus. The mare was 15 hands (152.4 cm) high and weighed approximately 400 kg. The mare was in good body condition with no other abnormalities noted. The mare was repeatedly examined by rectal palpation. The ovaries were 2.5 cm long and on one occasion a small 10 mm follicle was palpated. The uterus and cervix were small and persistently flaccid. A tentative diagnosis of Turnerlike syndrome was made. One intramuscular injection of 5 mg of dinoprost tromethamine (Lutalyse, Tuco Products Co., Orangeville, Ontario) was ineffective in inducing estrus. On May 2, 1986 a venous blood sample was taken and air-dried smears were stained with Wright's stain. On May 21, 1986 a heparinized blood sample was drawn from the jugular vein and taken to the Ontario Veterinary College (OW) for karyotyping. The blood smears were examined for the presence of \"drumsticks\" (a drumstick is a sex chromatin body or Barr body that appears as an appendage on a lobe of the nucleus in polymorphonuclear leukocytes in female mammals (5)). Two percent of the neutrophils (2 of 100) had drumsticks. The cultures of the heparinized blood sample were processed and subjected to karyotypic analysis. Of the twentysix cells examined, twenty-three (88.5%) were 64,XX and three were 63,XO. The normal chromosomal complement for the domestic horse, Equus caballus, is 2n = 64. Abnormal female karyotypes that impair fertility include the 63,XO aneuploid Turner-like syndrome, and mosaicism with 63,XO/ 64,XX cells (1, 2, 3, 4, 5, 6). The condition of the 63,XO gonadal dysgenesis may account for some cases of primary infertility in the mare (7). These two ","PeriodicalId":166644,"journal":{"name":"Equine reproductive physiology, breeding and stud management","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125833257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Management of the mare during lactation and at weaning. 母马哺乳期和断奶期的管理。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0226

引用次数: 0

General stallion management. 一般种马管理。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0276

引用次数: 0

Management of the pregnant mare. 怀孕母马的管理。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1002/9780470751176.ch5

M. Morel

引用次数: 5

Advanced reproductive techniques. 先进的生殖技术。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0389

引用次数: 0

Mare reproductive anatomy. 母马生殖解剖学。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0003

引用次数: 0

Management of the mare at mating. 母马交配时的管理。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0163

引用次数: 0

Selection of the stallion for breeding. 选择种马进行繁育。

Equine reproductive physiology, breeding and stud management Pub Date : 1900-01-01 DOI: 10.1079/9781789242232.0259

引用次数: 0