Study Of The Technology About B-ultrasonography On The Breeding Of Little-tailed Han Sheep

In this experiment,a group of little tailed Han sheep that came from Hongde breeding stock farm in Xinxiang, Henan Dubo Industrial Co., Ltd, Henan breeding sheep center and other little tailed Han sheep farm have been chosen and treated for synchronization of estrus for twice. Three days later,B-mode ultrasound has been used to detect these sheep once a day. Through continuous observation of the developmental capacity of the ovaries and ovarian follicles, the typical sonogram was reserved. As soon as the breeding moment can be sure, artificial fertilization will be done. The B-mode ultrasonograph was used to detect the number of these female sheep fetuses through the diagnosis of early pregnant from 18th day. Then the typical sonogram was reserved,induced and sorted. The ones that can't breed as normal were kept monitoring their reproductive system and the typical shadowgraphs of cases were collected. On the other hand, we detected the eye muscle area of living body for all of little tailed Han sheep in this experiment and collected the shadowgraph.Through the treatment and systematic analysis about the typical shadowgraph and diseases on breeding system of these little tailed Han sheep's every stage during pregnant, the anatomical location of the ovaries and the uterus of the body for the exploration with B-mode ultrasonograph and the exploratory technology have been ensured,as well as the exploratory technology with B-mode ultrasonograph intrarectal to the ovary and uterus during every stage and in every circumstance. The uterus of the unpregnancy female sheep and that pregnancy within 25 days lie in pelvis cavity,the uterus body on the anodic of bladder,but two horns of uterus lie ahead of bladder and within in two sides of uterus. On the 23rd day,the early image of the fetal cyst and the conceptus reaction in the cysts can be detected in the area of uterus of little tailed Han sheep,then the image of the conceptus reaction become more obvous while pregnancy for 40 days. On the 55th day, the skeleton of the conceptus can feedback dense echo and fetus palmus can be detected. After the 75th day pregrancy, the clear image of the placenta can be acquired by B-mode ultrasonograph. First of all,the image of the section of the two ovaries should be found in the area of uterus,some round aqueous round dark in this area is the section of the ovarian follicle,if the diameter is greater than 8 mm,the female is in the uterus period. Since the ovarian volume is not too big and ovary is near rectum, the matrix probe method was used to detect ovary from two sides ahead of bladder conveniently. The graphs were distinct and convenient to observe. Based on the bladder, the location of uterus can be found firstly, then ovary can be located and observed comprehensively. The emphasis was to observe the size and number of the ovary, ovarian follicle,the developmental degree and the size of the uterus and whether it were normal and so on. After comparison of bilateral horn of uterus,we would get which horn was in ovulation period. Further,the technical parameter about B-mode ultrasonograph in every stages of the pregnancy and the definition technique of fetal number,fetal age and fetal vitality have been gained from this experiment. The detection of eye muscle area of living body was summarized.Through detecting follicular development and the time of ovulation,exact breeding can be done. The utilization of B-mode ultrasonograph can detect early pregnancy, decrease nonpregnant and reduce the cost of breeding. After monitoring the number and the vigor of the uterus,some disease about pregnant toxemia of sheep,fetal death,abortion and so on can be prevented; the reproduction rate of little tailed Han sheep can be elevated through the survey of disease on reproductive system. On the other hand,ultrasonic imaging technology has momentous sense on the application of the little tailed Han sheep breeding.In summary of the above, the ultrasonograph technology has significant sense on little tailed Han sheep breeding and was worth popularization and application.